1 /**************************************************************************/
3 /* IBM System i and System p Virtual NIC Device Driver */
4 /* Copyright (C) 2014 IBM Corp. */
5 /* Santiago Leon (santi_leon@yahoo.com) */
6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
7 /* John Allen (jallen@linux.vnet.ibm.com) */
9 /* This program is free software; you can redistribute it and/or modify */
10 /* it under the terms of the GNU General Public License as published by */
11 /* the Free Software Foundation; either version 2 of the License, or */
12 /* (at your option) any later version. */
14 /* This program is distributed in the hope that it will be useful, */
15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
17 /* GNU General Public License for more details. */
19 /* You should have received a copy of the GNU General Public License */
20 /* along with this program. */
22 /* This module contains the implementation of a virtual ethernet device */
23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
24 /* option of the RS/6000 Platform Architecture to interface with virtual */
25 /* ethernet NICs that are presented to the partition by the hypervisor. */
27 /* Messages are passed between the VNIC driver and the VNIC server using */
28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
29 /* issue and receive commands that initiate communication with the server */
30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
31 /* are used by the driver to notify the server that a packet is */
32 /* ready for transmission or that a buffer has been added to receive a */
33 /* packet. Subsequently, sCRQs are used by the server to notify the */
34 /* driver that a packet transmission has been completed or that a packet */
35 /* has been received and placed in a waiting buffer. */
37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
38 /* which skbs are DMA mapped and immediately unmapped when the transmit */
39 /* or receive has been completed, the VNIC driver is required to use */
40 /* "long term mapping". This entails that large, continuous DMA mapped */
41 /* buffers are allocated on driver initialization and these buffers are */
42 /* then continuously reused to pass skbs to and from the VNIC server. */
44 /**************************************************************************/
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/types.h>
49 #include <linux/errno.h>
50 #include <linux/completion.h>
51 #include <linux/ioport.h>
52 #include <linux/dma-mapping.h>
53 #include <linux/kernel.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
56 #include <linux/skbuff.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
60 #include <linux/ethtool.h>
61 #include <linux/proc_fs.h>
62 #include <linux/if_arp.h>
65 #include <linux/ipv6.h>
66 #include <linux/irq.h>
67 #include <linux/kthread.h>
68 #include <linux/seq_file.h>
69 #include <linux/interrupt.h>
70 #include <net/net_namespace.h>
71 #include <asm/hvcall.h>
72 #include <linux/atomic.h>
74 #include <asm/iommu.h>
75 #include <linux/uaccess.h>
76 #include <asm/firmware.h>
77 #include <linux/workqueue.h>
78 #include <linux/if_vlan.h>
79 #include <linux/utsname.h>
83 static const char ibmvnic_driver_name[] = "ibmvnic";
84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
86 MODULE_AUTHOR("Santiago Leon");
87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
88 MODULE_LICENSE("GPL");
89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
92 static int ibmvnic_remove(struct vio_dev *);
93 static void release_sub_crqs(struct ibmvnic_adapter *);
94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
99 union sub_crq *sub_crq);
100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
102 static int enable_scrq_irq(struct ibmvnic_adapter *,
103 struct ibmvnic_sub_crq_queue *);
104 static int disable_scrq_irq(struct ibmvnic_adapter *,
105 struct ibmvnic_sub_crq_queue *);
106 static int pending_scrq(struct ibmvnic_adapter *,
107 struct ibmvnic_sub_crq_queue *);
108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
109 struct ibmvnic_sub_crq_queue *);
110 static int ibmvnic_poll(struct napi_struct *napi, int data);
111 static void send_map_query(struct ibmvnic_adapter *adapter);
112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
113 static void send_request_unmap(struct ibmvnic_adapter *, u8);
114 static void send_login(struct ibmvnic_adapter *adapter);
115 static void send_cap_queries(struct ibmvnic_adapter *adapter);
116 static int init_sub_crqs(struct ibmvnic_adapter *);
117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
118 static int ibmvnic_init(struct ibmvnic_adapter *);
119 static void release_crq_queue(struct ibmvnic_adapter *);
120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
122 struct ibmvnic_stat {
123 char name[ETH_GSTRING_LEN];
127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
128 offsetof(struct ibmvnic_statistics, stat))
129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
131 static const struct ibmvnic_stat ibmvnic_stats[] = {
132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
157 unsigned long length, unsigned long *number,
160 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
163 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
171 struct ibmvnic_long_term_buff *ltb, int size)
173 struct device *dev = &adapter->vdev->dev;
176 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
180 dev_err(dev, "Couldn't alloc long term buffer\n");
183 ltb->map_id = adapter->map_id;
186 init_completion(&adapter->fw_done);
187 send_request_map(adapter, ltb->addr,
188 ltb->size, ltb->map_id);
189 wait_for_completion(&adapter->fw_done);
191 if (adapter->fw_done_rc) {
192 dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
193 adapter->fw_done_rc);
199 static void free_long_term_buff(struct ibmvnic_adapter *adapter,
200 struct ibmvnic_long_term_buff *ltb)
202 struct device *dev = &adapter->vdev->dev;
207 if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
208 adapter->reset_reason != VNIC_RESET_MOBILITY)
209 send_request_unmap(adapter, ltb->map_id);
210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
214 struct ibmvnic_long_term_buff *ltb)
216 memset(ltb->buff, 0, ltb->size);
218 init_completion(&adapter->fw_done);
219 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
220 wait_for_completion(&adapter->fw_done);
222 if (adapter->fw_done_rc) {
223 dev_info(&adapter->vdev->dev,
224 "Reset failed, attempting to free and reallocate buffer\n");
225 free_long_term_buff(adapter, ltb);
226 return alloc_long_term_buff(adapter, ltb, ltb->size);
231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
235 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
237 adapter->rx_pool[i].active = 0;
240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
241 struct ibmvnic_rx_pool *pool)
243 int count = pool->size - atomic_read(&pool->available);
244 struct device *dev = &adapter->vdev->dev;
245 int buffers_added = 0;
246 unsigned long lpar_rc;
247 union sub_crq sub_crq;
260 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
261 be32_to_cpu(adapter->login_rsp_buf->
264 for (i = 0; i < count; ++i) {
265 skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
267 dev_err(dev, "Couldn't replenish rx buff\n");
268 adapter->replenish_no_mem++;
272 index = pool->free_map[pool->next_free];
274 if (pool->rx_buff[index].skb)
275 dev_err(dev, "Inconsistent free_map!\n");
277 /* Copy the skb to the long term mapped DMA buffer */
278 offset = index * pool->buff_size;
279 dst = pool->long_term_buff.buff + offset;
280 memset(dst, 0, pool->buff_size);
281 dma_addr = pool->long_term_buff.addr + offset;
282 pool->rx_buff[index].data = dst;
284 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
285 pool->rx_buff[index].dma = dma_addr;
286 pool->rx_buff[index].skb = skb;
287 pool->rx_buff[index].pool_index = pool->index;
288 pool->rx_buff[index].size = pool->buff_size;
290 memset(&sub_crq, 0, sizeof(sub_crq));
291 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
292 sub_crq.rx_add.correlator =
293 cpu_to_be64((u64)&pool->rx_buff[index]);
294 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
295 sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
297 /* The length field of the sCRQ is defined to be 24 bits so the
298 * buffer size needs to be left shifted by a byte before it is
299 * converted to big endian to prevent the last byte from being
302 #ifdef __LITTLE_ENDIAN__
305 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
307 lpar_rc = send_subcrq(adapter, handle_array[pool->index],
309 if (lpar_rc != H_SUCCESS)
313 adapter->replenish_add_buff_success++;
314 pool->next_free = (pool->next_free + 1) % pool->size;
316 atomic_add(buffers_added, &pool->available);
320 dev_info(dev, "replenish pools failure\n");
321 pool->free_map[pool->next_free] = index;
322 pool->rx_buff[index].skb = NULL;
323 if (!dma_mapping_error(dev, dma_addr))
324 dma_unmap_single(dev, dma_addr, pool->buff_size,
327 dev_kfree_skb_any(skb);
328 adapter->replenish_add_buff_failure++;
329 atomic_add(buffers_added, &pool->available);
331 if (lpar_rc == H_CLOSED) {
332 /* Disable buffer pool replenishment and report carrier off if
333 * queue is closed. Firmware guarantees that a signal will
334 * be sent to the driver, triggering a reset.
336 deactivate_rx_pools(adapter);
337 netif_carrier_off(adapter->netdev);
341 static void replenish_pools(struct ibmvnic_adapter *adapter)
345 adapter->replenish_task_cycles++;
346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
348 if (adapter->rx_pool[i].active)
349 replenish_rx_pool(adapter, &adapter->rx_pool[i]);
353 static void release_stats_buffers(struct ibmvnic_adapter *adapter)
355 kfree(adapter->tx_stats_buffers);
356 kfree(adapter->rx_stats_buffers);
357 adapter->tx_stats_buffers = NULL;
358 adapter->rx_stats_buffers = NULL;
361 static int init_stats_buffers(struct ibmvnic_adapter *adapter)
363 adapter->tx_stats_buffers =
364 kcalloc(adapter->req_tx_queues,
365 sizeof(struct ibmvnic_tx_queue_stats),
367 if (!adapter->tx_stats_buffers)
370 adapter->rx_stats_buffers =
371 kcalloc(adapter->req_rx_queues,
372 sizeof(struct ibmvnic_rx_queue_stats),
374 if (!adapter->rx_stats_buffers)
380 static void release_stats_token(struct ibmvnic_adapter *adapter)
382 struct device *dev = &adapter->vdev->dev;
384 if (!adapter->stats_token)
387 dma_unmap_single(dev, adapter->stats_token,
388 sizeof(struct ibmvnic_statistics),
390 adapter->stats_token = 0;
393 static int init_stats_token(struct ibmvnic_adapter *adapter)
395 struct device *dev = &adapter->vdev->dev;
398 stok = dma_map_single(dev, &adapter->stats,
399 sizeof(struct ibmvnic_statistics),
401 if (dma_mapping_error(dev, stok)) {
402 dev_err(dev, "Couldn't map stats buffer\n");
406 adapter->stats_token = stok;
407 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
411 static int reset_rx_pools(struct ibmvnic_adapter *adapter)
413 struct ibmvnic_rx_pool *rx_pool;
418 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
419 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
421 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
422 for (i = 0; i < rx_scrqs; i++) {
423 rx_pool = &adapter->rx_pool[i];
425 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
427 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
428 free_long_term_buff(adapter, &rx_pool->long_term_buff);
429 rx_pool->buff_size = be64_to_cpu(size_array[i]);
430 alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
434 rc = reset_long_term_buff(adapter,
435 &rx_pool->long_term_buff);
441 for (j = 0; j < rx_pool->size; j++)
442 rx_pool->free_map[j] = j;
444 memset(rx_pool->rx_buff, 0,
445 rx_pool->size * sizeof(struct ibmvnic_rx_buff));
447 atomic_set(&rx_pool->available, 0);
448 rx_pool->next_alloc = 0;
449 rx_pool->next_free = 0;
456 static void release_rx_pools(struct ibmvnic_adapter *adapter)
458 struct ibmvnic_rx_pool *rx_pool;
461 if (!adapter->rx_pool)
464 for (i = 0; i < adapter->num_active_rx_pools; i++) {
465 rx_pool = &adapter->rx_pool[i];
467 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
469 kfree(rx_pool->free_map);
470 free_long_term_buff(adapter, &rx_pool->long_term_buff);
472 if (!rx_pool->rx_buff)
475 for (j = 0; j < rx_pool->size; j++) {
476 if (rx_pool->rx_buff[j].skb) {
477 dev_kfree_skb_any(rx_pool->rx_buff[i].skb);
478 rx_pool->rx_buff[i].skb = NULL;
482 kfree(rx_pool->rx_buff);
485 kfree(adapter->rx_pool);
486 adapter->rx_pool = NULL;
487 adapter->num_active_rx_pools = 0;
490 static int init_rx_pools(struct net_device *netdev)
492 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
493 struct device *dev = &adapter->vdev->dev;
494 struct ibmvnic_rx_pool *rx_pool;
500 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
501 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
502 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
504 adapter->rx_pool = kcalloc(rxadd_subcrqs,
505 sizeof(struct ibmvnic_rx_pool),
507 if (!adapter->rx_pool) {
508 dev_err(dev, "Failed to allocate rx pools\n");
512 adapter->num_active_rx_pools = 0;
514 for (i = 0; i < rxadd_subcrqs; i++) {
515 rx_pool = &adapter->rx_pool[i];
517 netdev_dbg(adapter->netdev,
518 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
519 i, adapter->req_rx_add_entries_per_subcrq,
520 be64_to_cpu(size_array[i]));
522 rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
524 rx_pool->buff_size = be64_to_cpu(size_array[i]);
527 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
529 if (!rx_pool->free_map) {
530 release_rx_pools(adapter);
534 rx_pool->rx_buff = kcalloc(rx_pool->size,
535 sizeof(struct ibmvnic_rx_buff),
537 if (!rx_pool->rx_buff) {
538 dev_err(dev, "Couldn't alloc rx buffers\n");
539 release_rx_pools(adapter);
543 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
544 rx_pool->size * rx_pool->buff_size)) {
545 release_rx_pools(adapter);
549 for (j = 0; j < rx_pool->size; ++j)
550 rx_pool->free_map[j] = j;
552 atomic_set(&rx_pool->available, 0);
553 rx_pool->next_alloc = 0;
554 rx_pool->next_free = 0;
557 adapter->num_active_rx_pools = rxadd_subcrqs;
562 static int reset_tx_pools(struct ibmvnic_adapter *adapter)
564 struct ibmvnic_tx_pool *tx_pool;
568 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
569 for (i = 0; i < tx_scrqs; i++) {
570 netdev_dbg(adapter->netdev, "Re-setting tx_pool[%d]\n", i);
572 tx_pool = &adapter->tx_pool[i];
574 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
578 rc = reset_long_term_buff(adapter, &tx_pool->tso_ltb);
582 memset(tx_pool->tx_buff, 0,
583 adapter->req_tx_entries_per_subcrq *
584 sizeof(struct ibmvnic_tx_buff));
586 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
587 tx_pool->free_map[j] = j;
589 tx_pool->consumer_index = 0;
590 tx_pool->producer_index = 0;
591 tx_pool->tso_index = 0;
597 static void release_vpd_data(struct ibmvnic_adapter *adapter)
602 kfree(adapter->vpd->buff);
608 static void release_tx_pools(struct ibmvnic_adapter *adapter)
610 struct ibmvnic_tx_pool *tx_pool;
613 if (!adapter->tx_pool)
616 for (i = 0; i < adapter->num_active_tx_pools; i++) {
617 netdev_dbg(adapter->netdev, "Releasing tx_pool[%d]\n", i);
618 tx_pool = &adapter->tx_pool[i];
619 kfree(tx_pool->tx_buff);
620 free_long_term_buff(adapter, &tx_pool->long_term_buff);
621 free_long_term_buff(adapter, &tx_pool->tso_ltb);
622 kfree(tx_pool->free_map);
625 kfree(adapter->tx_pool);
626 adapter->tx_pool = NULL;
627 adapter->num_active_tx_pools = 0;
630 static int init_tx_pools(struct net_device *netdev)
632 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
633 struct device *dev = &adapter->vdev->dev;
634 struct ibmvnic_tx_pool *tx_pool;
638 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
639 adapter->tx_pool = kcalloc(tx_subcrqs,
640 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
641 if (!adapter->tx_pool)
644 adapter->num_active_tx_pools = 0;
646 for (i = 0; i < tx_subcrqs; i++) {
647 tx_pool = &adapter->tx_pool[i];
649 netdev_dbg(adapter->netdev,
650 "Initializing tx_pool[%d], %lld buffs\n",
651 i, adapter->req_tx_entries_per_subcrq);
653 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq,
654 sizeof(struct ibmvnic_tx_buff),
656 if (!tx_pool->tx_buff) {
657 dev_err(dev, "tx pool buffer allocation failed\n");
658 release_tx_pools(adapter);
662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
663 adapter->req_tx_entries_per_subcrq *
665 release_tx_pools(adapter);
670 if (alloc_long_term_buff(adapter, &tx_pool->tso_ltb,
672 IBMVNIC_TSO_BUF_SZ)) {
673 release_tx_pools(adapter);
677 tx_pool->tso_index = 0;
679 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq,
680 sizeof(int), GFP_KERNEL);
681 if (!tx_pool->free_map) {
682 release_tx_pools(adapter);
686 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++)
687 tx_pool->free_map[j] = j;
689 tx_pool->consumer_index = 0;
690 tx_pool->producer_index = 0;
693 adapter->num_active_tx_pools = tx_subcrqs;
698 static void release_error_buffers(struct ibmvnic_adapter *adapter)
700 struct device *dev = &adapter->vdev->dev;
701 struct ibmvnic_error_buff *error_buff, *tmp;
704 spin_lock_irqsave(&adapter->error_list_lock, flags);
705 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) {
706 list_del(&error_buff->list);
707 dma_unmap_single(dev, error_buff->dma, error_buff->len,
709 kfree(error_buff->buff);
712 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
715 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
719 if (adapter->napi_enabled)
722 for (i = 0; i < adapter->req_rx_queues; i++)
723 napi_enable(&adapter->napi[i]);
725 adapter->napi_enabled = true;
728 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
732 if (!adapter->napi_enabled)
735 for (i = 0; i < adapter->req_rx_queues; i++) {
736 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
737 napi_disable(&adapter->napi[i]);
740 adapter->napi_enabled = false;
743 static int ibmvnic_login(struct net_device *netdev)
745 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
746 unsigned long timeout = msecs_to_jiffies(30000);
747 struct device *dev = &adapter->vdev->dev;
751 if (adapter->renegotiate) {
752 adapter->renegotiate = false;
753 release_sub_crqs(adapter);
755 reinit_completion(&adapter->init_done);
756 send_cap_queries(adapter);
757 if (!wait_for_completion_timeout(&adapter->init_done,
759 dev_err(dev, "Capabilities query timeout\n");
762 rc = init_sub_crqs(adapter);
765 "Initialization of SCRQ's failed\n");
768 rc = init_sub_crq_irqs(adapter);
771 "Initialization of SCRQ's irqs failed\n");
776 reinit_completion(&adapter->init_done);
778 if (!wait_for_completion_timeout(&adapter->init_done,
780 dev_err(dev, "Login timeout\n");
783 } while (adapter->renegotiate);
785 /* handle pending MAC address changes after successful login */
786 if (adapter->mac_change_pending) {
787 __ibmvnic_set_mac(netdev, &adapter->desired.mac);
788 adapter->mac_change_pending = false;
794 static void release_resources(struct ibmvnic_adapter *adapter)
798 release_vpd_data(adapter);
800 release_tx_pools(adapter);
801 release_rx_pools(adapter);
803 release_stats_token(adapter);
804 release_stats_buffers(adapter);
805 release_error_buffers(adapter);
808 for (i = 0; i < adapter->req_rx_queues; i++) {
809 if (&adapter->napi[i]) {
810 netdev_dbg(adapter->netdev,
811 "Releasing napi[%d]\n", i);
812 netif_napi_del(&adapter->napi[i]);
818 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
820 struct net_device *netdev = adapter->netdev;
821 unsigned long timeout = msecs_to_jiffies(30000);
822 union ibmvnic_crq crq;
826 netdev_dbg(netdev, "setting link state %d\n", link_state);
828 memset(&crq, 0, sizeof(crq));
829 crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
830 crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
831 crq.logical_link_state.link_state = link_state;
836 reinit_completion(&adapter->init_done);
837 rc = ibmvnic_send_crq(adapter, &crq);
839 netdev_err(netdev, "Failed to set link state\n");
843 if (!wait_for_completion_timeout(&adapter->init_done,
845 netdev_err(netdev, "timeout setting link state\n");
849 if (adapter->init_done_rc == 1) {
850 /* Partuial success, delay and re-send */
859 static int set_real_num_queues(struct net_device *netdev)
861 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
864 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
865 adapter->req_tx_queues, adapter->req_rx_queues);
867 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
869 netdev_err(netdev, "failed to set the number of tx queues\n");
873 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
875 netdev_err(netdev, "failed to set the number of rx queues\n");
880 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
882 struct device *dev = &adapter->vdev->dev;
883 union ibmvnic_crq crq;
886 if (adapter->vpd->buff)
887 len = adapter->vpd->len;
889 init_completion(&adapter->fw_done);
890 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
891 crq.get_vpd_size.cmd = GET_VPD_SIZE;
892 ibmvnic_send_crq(adapter, &crq);
893 wait_for_completion(&adapter->fw_done);
895 if (!adapter->vpd->len)
898 if (!adapter->vpd->buff)
899 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
900 else if (adapter->vpd->len != len)
902 krealloc(adapter->vpd->buff,
903 adapter->vpd->len, GFP_KERNEL);
905 if (!adapter->vpd->buff) {
906 dev_err(dev, "Could allocate VPD buffer\n");
910 adapter->vpd->dma_addr =
911 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
913 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
914 dev_err(dev, "Could not map VPD buffer\n");
915 kfree(adapter->vpd->buff);
916 adapter->vpd->buff = NULL;
920 reinit_completion(&adapter->fw_done);
921 crq.get_vpd.first = IBMVNIC_CRQ_CMD;
922 crq.get_vpd.cmd = GET_VPD;
923 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
924 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
925 ibmvnic_send_crq(adapter, &crq);
926 wait_for_completion(&adapter->fw_done);
931 static int init_resources(struct ibmvnic_adapter *adapter)
933 struct net_device *netdev = adapter->netdev;
936 rc = set_real_num_queues(netdev);
940 rc = init_stats_buffers(adapter);
944 rc = init_stats_token(adapter);
948 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
952 /* Vital Product Data (VPD) */
953 rc = ibmvnic_get_vpd(adapter);
955 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
960 adapter->napi = kcalloc(adapter->req_rx_queues,
961 sizeof(struct napi_struct), GFP_KERNEL);
965 for (i = 0; i < adapter->req_rx_queues; i++) {
966 netdev_dbg(netdev, "Adding napi[%d]\n", i);
967 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
971 send_map_query(adapter);
973 rc = init_rx_pools(netdev);
977 rc = init_tx_pools(netdev);
981 static int __ibmvnic_open(struct net_device *netdev)
983 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
984 enum vnic_state prev_state = adapter->state;
987 adapter->state = VNIC_OPENING;
988 replenish_pools(adapter);
989 ibmvnic_napi_enable(adapter);
991 /* We're ready to receive frames, enable the sub-crq interrupts and
992 * set the logical link state to up
994 for (i = 0; i < adapter->req_rx_queues; i++) {
995 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
996 if (prev_state == VNIC_CLOSED)
997 enable_irq(adapter->rx_scrq[i]->irq);
999 enable_scrq_irq(adapter, adapter->rx_scrq[i]);
1002 for (i = 0; i < adapter->req_tx_queues; i++) {
1003 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
1004 if (prev_state == VNIC_CLOSED)
1005 enable_irq(adapter->tx_scrq[i]->irq);
1007 enable_scrq_irq(adapter, adapter->tx_scrq[i]);
1010 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
1012 for (i = 0; i < adapter->req_rx_queues; i++)
1013 napi_disable(&adapter->napi[i]);
1014 release_resources(adapter);
1018 netif_tx_start_all_queues(netdev);
1020 if (prev_state == VNIC_CLOSED) {
1021 for (i = 0; i < adapter->req_rx_queues; i++)
1022 napi_schedule(&adapter->napi[i]);
1025 adapter->state = VNIC_OPEN;
1029 static int ibmvnic_open(struct net_device *netdev)
1031 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1034 mutex_lock(&adapter->reset_lock);
1036 if (adapter->state != VNIC_CLOSED) {
1037 rc = ibmvnic_login(netdev);
1039 mutex_unlock(&adapter->reset_lock);
1043 rc = init_resources(adapter);
1045 netdev_err(netdev, "failed to initialize resources\n");
1046 release_resources(adapter);
1047 mutex_unlock(&adapter->reset_lock);
1052 rc = __ibmvnic_open(netdev);
1053 netif_carrier_on(netdev);
1055 mutex_unlock(&adapter->reset_lock);
1060 static void clean_tx_pools(struct ibmvnic_adapter *adapter)
1062 struct ibmvnic_tx_pool *tx_pool;
1067 if (!adapter->tx_pool)
1070 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
1071 tx_entries = adapter->req_tx_entries_per_subcrq;
1073 /* Free any remaining skbs in the tx buffer pools */
1074 for (i = 0; i < tx_scrqs; i++) {
1075 tx_pool = &adapter->tx_pool[i];
1079 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
1080 for (j = 0; j < tx_entries; j++) {
1081 if (tx_pool->tx_buff[j].skb) {
1082 dev_kfree_skb_any(tx_pool->tx_buff[j].skb);
1083 tx_pool->tx_buff[j].skb = NULL;
1089 static int __ibmvnic_close(struct net_device *netdev)
1091 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1095 adapter->state = VNIC_CLOSING;
1097 /* ensure that transmissions are stopped if called by do_reset */
1098 if (adapter->resetting)
1099 netif_tx_disable(netdev);
1101 netif_tx_stop_all_queues(netdev);
1103 ibmvnic_napi_disable(adapter);
1105 if (adapter->tx_scrq) {
1106 for (i = 0; i < adapter->req_tx_queues; i++)
1107 if (adapter->tx_scrq[i]->irq) {
1108 netdev_dbg(adapter->netdev,
1109 "Disabling tx_scrq[%d] irq\n", i);
1110 disable_irq(adapter->tx_scrq[i]->irq);
1114 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
1118 if (adapter->rx_scrq) {
1119 for (i = 0; i < adapter->req_rx_queues; i++) {
1122 while (pending_scrq(adapter, adapter->rx_scrq[i])) {
1130 if (adapter->rx_scrq[i]->irq) {
1131 netdev_dbg(adapter->netdev,
1132 "Disabling rx_scrq[%d] irq\n", i);
1133 disable_irq(adapter->rx_scrq[i]->irq);
1138 clean_tx_pools(adapter);
1139 adapter->state = VNIC_CLOSED;
1143 static int ibmvnic_close(struct net_device *netdev)
1145 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1148 mutex_lock(&adapter->reset_lock);
1149 rc = __ibmvnic_close(netdev);
1150 mutex_unlock(&adapter->reset_lock);
1156 * build_hdr_data - creates L2/L3/L4 header data buffer
1157 * @hdr_field - bitfield determining needed headers
1158 * @skb - socket buffer
1159 * @hdr_len - array of header lengths
1160 * @tot_len - total length of data
1162 * Reads hdr_field to determine which headers are needed by firmware.
1163 * Builds a buffer containing these headers. Saves individual header
1164 * lengths and total buffer length to be used to build descriptors.
1166 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
1167 int *hdr_len, u8 *hdr_data)
1172 hdr_len[0] = sizeof(struct ethhdr);
1174 if (skb->protocol == htons(ETH_P_IP)) {
1175 hdr_len[1] = ip_hdr(skb)->ihl * 4;
1176 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
1177 hdr_len[2] = tcp_hdrlen(skb);
1178 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1179 hdr_len[2] = sizeof(struct udphdr);
1180 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1181 hdr_len[1] = sizeof(struct ipv6hdr);
1182 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
1183 hdr_len[2] = tcp_hdrlen(skb);
1184 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
1185 hdr_len[2] = sizeof(struct udphdr);
1186 } else if (skb->protocol == htons(ETH_P_ARP)) {
1187 hdr_len[1] = arp_hdr_len(skb->dev);
1191 memset(hdr_data, 0, 120);
1192 if ((hdr_field >> 6) & 1) {
1193 hdr = skb_mac_header(skb);
1194 memcpy(hdr_data, hdr, hdr_len[0]);
1198 if ((hdr_field >> 5) & 1) {
1199 hdr = skb_network_header(skb);
1200 memcpy(hdr_data + len, hdr, hdr_len[1]);
1204 if ((hdr_field >> 4) & 1) {
1205 hdr = skb_transport_header(skb);
1206 memcpy(hdr_data + len, hdr, hdr_len[2]);
1213 * create_hdr_descs - create header and header extension descriptors
1214 * @hdr_field - bitfield determining needed headers
1215 * @data - buffer containing header data
1216 * @len - length of data buffer
1217 * @hdr_len - array of individual header lengths
1218 * @scrq_arr - descriptor array
1220 * Creates header and, if needed, header extension descriptors and
1221 * places them in a descriptor array, scrq_arr
1224 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
1225 union sub_crq *scrq_arr)
1227 union sub_crq hdr_desc;
1233 while (tmp_len > 0) {
1234 cur = hdr_data + len - tmp_len;
1236 memset(&hdr_desc, 0, sizeof(hdr_desc));
1237 if (cur != hdr_data) {
1238 data = hdr_desc.hdr_ext.data;
1239 tmp = tmp_len > 29 ? 29 : tmp_len;
1240 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
1241 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
1242 hdr_desc.hdr_ext.len = tmp;
1244 data = hdr_desc.hdr.data;
1245 tmp = tmp_len > 24 ? 24 : tmp_len;
1246 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
1247 hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
1248 hdr_desc.hdr.len = tmp;
1249 hdr_desc.hdr.l2_len = (u8)hdr_len[0];
1250 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
1251 hdr_desc.hdr.l4_len = (u8)hdr_len[2];
1252 hdr_desc.hdr.flag = hdr_field << 1;
1254 memcpy(data, cur, tmp);
1256 *scrq_arr = hdr_desc;
1265 * build_hdr_descs_arr - build a header descriptor array
1266 * @skb - socket buffer
1267 * @num_entries - number of descriptors to be sent
1268 * @subcrq - first TX descriptor
1269 * @hdr_field - bit field determining which headers will be sent
1271 * This function will build a TX descriptor array with applicable
1272 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
1275 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
1276 int *num_entries, u8 hdr_field)
1278 int hdr_len[3] = {0, 0, 0};
1280 u8 *hdr_data = txbuff->hdr_data;
1282 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
1284 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
1285 txbuff->indir_arr + 1);
1288 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
1290 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1291 int queue_num = skb_get_queue_mapping(skb);
1292 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
1293 struct device *dev = &adapter->vdev->dev;
1294 struct ibmvnic_tx_buff *tx_buff = NULL;
1295 struct ibmvnic_sub_crq_queue *tx_scrq;
1296 struct ibmvnic_tx_pool *tx_pool;
1297 unsigned int tx_send_failed = 0;
1298 unsigned int tx_map_failed = 0;
1299 unsigned int tx_dropped = 0;
1300 unsigned int tx_packets = 0;
1301 unsigned int tx_bytes = 0;
1302 dma_addr_t data_dma_addr;
1303 struct netdev_queue *txq;
1304 unsigned long lpar_rc;
1305 union sub_crq tx_crq;
1306 unsigned int offset;
1307 int num_entries = 1;
1314 if (adapter->resetting) {
1315 if (!netif_subqueue_stopped(netdev, skb))
1316 netif_stop_subqueue(netdev, queue_num);
1317 dev_kfree_skb_any(skb);
1325 tx_pool = &adapter->tx_pool[queue_num];
1326 tx_scrq = adapter->tx_scrq[queue_num];
1327 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
1328 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
1329 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
1331 index = tx_pool->free_map[tx_pool->consumer_index];
1333 if (skb_is_gso(skb)) {
1334 offset = tx_pool->tso_index * IBMVNIC_TSO_BUF_SZ;
1335 dst = tx_pool->tso_ltb.buff + offset;
1336 memset(dst, 0, IBMVNIC_TSO_BUF_SZ);
1337 data_dma_addr = tx_pool->tso_ltb.addr + offset;
1338 tx_pool->tso_index++;
1339 if (tx_pool->tso_index == IBMVNIC_TSO_BUFS)
1340 tx_pool->tso_index = 0;
1342 offset = index * adapter->req_mtu;
1343 dst = tx_pool->long_term_buff.buff + offset;
1344 memset(dst, 0, adapter->req_mtu);
1345 data_dma_addr = tx_pool->long_term_buff.addr + offset;
1348 if (skb_shinfo(skb)->nr_frags) {
1352 skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
1353 cur = skb_headlen(skb);
1355 /* Copy the frags */
1356 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1357 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1360 page_address(skb_frag_page(frag)) +
1361 frag->page_offset, skb_frag_size(frag));
1362 cur += skb_frag_size(frag);
1365 skb_copy_from_linear_data(skb, dst, skb->len);
1368 tx_pool->consumer_index =
1369 (tx_pool->consumer_index + 1) %
1370 adapter->req_tx_entries_per_subcrq;
1372 tx_buff = &tx_pool->tx_buff[index];
1374 tx_buff->data_dma[0] = data_dma_addr;
1375 tx_buff->data_len[0] = skb->len;
1376 tx_buff->index = index;
1377 tx_buff->pool_index = queue_num;
1378 tx_buff->last_frag = true;
1380 memset(&tx_crq, 0, sizeof(tx_crq));
1381 tx_crq.v1.first = IBMVNIC_CRQ_CMD;
1382 tx_crq.v1.type = IBMVNIC_TX_DESC;
1383 tx_crq.v1.n_crq_elem = 1;
1384 tx_crq.v1.n_sge = 1;
1385 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
1386 tx_crq.v1.correlator = cpu_to_be32(index);
1387 if (skb_is_gso(skb))
1388 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->tso_ltb.map_id);
1390 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
1391 tx_crq.v1.sge_len = cpu_to_be32(skb->len);
1392 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
1394 if (adapter->vlan_header_insertion) {
1395 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
1396 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
1399 if (skb->protocol == htons(ETH_P_IP)) {
1400 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
1401 proto = ip_hdr(skb)->protocol;
1402 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1403 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
1404 proto = ipv6_hdr(skb)->nexthdr;
1407 if (proto == IPPROTO_TCP)
1408 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
1409 else if (proto == IPPROTO_UDP)
1410 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
1412 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1413 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
1416 if (skb_is_gso(skb)) {
1417 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
1418 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
1421 /* determine if l2/3/4 headers are sent to firmware */
1422 if ((*hdrs >> 7) & 1) {
1423 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
1424 tx_crq.v1.n_crq_elem = num_entries;
1425 tx_buff->indir_arr[0] = tx_crq;
1426 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
1427 sizeof(tx_buff->indir_arr),
1429 if (dma_mapping_error(dev, tx_buff->indir_dma)) {
1430 dev_kfree_skb_any(skb);
1431 tx_buff->skb = NULL;
1432 if (!firmware_has_feature(FW_FEATURE_CMO))
1433 dev_err(dev, "tx: unable to map descriptor array\n");
1439 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
1440 (u64)tx_buff->indir_dma,
1443 lpar_rc = send_subcrq(adapter, handle_array[queue_num],
1446 if (lpar_rc != H_SUCCESS) {
1447 dev_err(dev, "tx failed with code %ld\n", lpar_rc);
1449 if (tx_pool->consumer_index == 0)
1450 tx_pool->consumer_index =
1451 adapter->req_tx_entries_per_subcrq - 1;
1453 tx_pool->consumer_index--;
1455 dev_kfree_skb_any(skb);
1456 tx_buff->skb = NULL;
1458 if (lpar_rc == H_CLOSED) {
1459 /* Disable TX and report carrier off if queue is closed.
1460 * Firmware guarantees that a signal will be sent to the
1461 * driver, triggering a reset or some other action.
1463 netif_tx_stop_all_queues(netdev);
1464 netif_carrier_off(netdev);
1473 if (atomic_inc_return(&tx_scrq->used)
1474 >= adapter->req_tx_entries_per_subcrq) {
1475 netdev_info(netdev, "Stopping queue %d\n", queue_num);
1476 netif_stop_subqueue(netdev, queue_num);
1480 tx_bytes += skb->len;
1481 txq->trans_start = jiffies;
1485 netdev->stats.tx_dropped += tx_dropped;
1486 netdev->stats.tx_bytes += tx_bytes;
1487 netdev->stats.tx_packets += tx_packets;
1488 adapter->tx_send_failed += tx_send_failed;
1489 adapter->tx_map_failed += tx_map_failed;
1490 adapter->tx_stats_buffers[queue_num].packets += tx_packets;
1491 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
1492 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
1497 static void ibmvnic_set_multi(struct net_device *netdev)
1499 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1500 struct netdev_hw_addr *ha;
1501 union ibmvnic_crq crq;
1503 memset(&crq, 0, sizeof(crq));
1504 crq.request_capability.first = IBMVNIC_CRQ_CMD;
1505 crq.request_capability.cmd = REQUEST_CAPABILITY;
1507 if (netdev->flags & IFF_PROMISC) {
1508 if (!adapter->promisc_supported)
1511 if (netdev->flags & IFF_ALLMULTI) {
1512 /* Accept all multicast */
1513 memset(&crq, 0, sizeof(crq));
1514 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1515 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1516 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
1517 ibmvnic_send_crq(adapter, &crq);
1518 } else if (netdev_mc_empty(netdev)) {
1519 /* Reject all multicast */
1520 memset(&crq, 0, sizeof(crq));
1521 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1522 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1523 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
1524 ibmvnic_send_crq(adapter, &crq);
1526 /* Accept one or more multicast(s) */
1527 netdev_for_each_mc_addr(ha, netdev) {
1528 memset(&crq, 0, sizeof(crq));
1529 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
1530 crq.multicast_ctrl.cmd = MULTICAST_CTRL;
1531 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
1532 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
1534 ibmvnic_send_crq(adapter, &crq);
1540 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
1542 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1543 struct sockaddr *addr = p;
1544 union ibmvnic_crq crq;
1546 if (!is_valid_ether_addr(addr->sa_data))
1547 return -EADDRNOTAVAIL;
1549 memset(&crq, 0, sizeof(crq));
1550 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
1551 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
1552 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
1554 init_completion(&adapter->fw_done);
1555 ibmvnic_send_crq(adapter, &crq);
1556 wait_for_completion(&adapter->fw_done);
1557 /* netdev->dev_addr is changed in handle_change_mac_rsp function */
1558 return adapter->fw_done_rc ? -EIO : 0;
1561 static int ibmvnic_set_mac(struct net_device *netdev, void *p)
1563 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1564 struct sockaddr *addr = p;
1567 if (adapter->state == VNIC_PROBED) {
1568 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
1569 adapter->mac_change_pending = true;
1573 rc = __ibmvnic_set_mac(netdev, addr);
1579 * do_reset returns zero if we are able to keep processing reset events, or
1580 * non-zero if we hit a fatal error and must halt.
1582 static int do_reset(struct ibmvnic_adapter *adapter,
1583 struct ibmvnic_rwi *rwi, u32 reset_state)
1585 u64 old_num_rx_queues, old_num_tx_queues;
1586 struct net_device *netdev = adapter->netdev;
1589 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
1592 netif_carrier_off(netdev);
1593 adapter->reset_reason = rwi->reset_reason;
1595 old_num_rx_queues = adapter->req_rx_queues;
1596 old_num_tx_queues = adapter->req_tx_queues;
1598 if (rwi->reset_reason == VNIC_RESET_MOBILITY) {
1599 rc = ibmvnic_reenable_crq_queue(adapter);
1604 rc = __ibmvnic_close(netdev);
1608 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1609 adapter->wait_for_reset) {
1610 release_resources(adapter);
1611 release_sub_crqs(adapter);
1612 release_crq_queue(adapter);
1615 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
1616 /* remove the closed state so when we call open it appears
1617 * we are coming from the probed state.
1619 adapter->state = VNIC_PROBED;
1621 rc = ibmvnic_init(adapter);
1623 return IBMVNIC_INIT_FAILED;
1625 /* If the adapter was in PROBE state prior to the reset,
1628 if (reset_state == VNIC_PROBED)
1631 rc = ibmvnic_login(netdev);
1633 adapter->state = VNIC_PROBED;
1637 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
1638 adapter->wait_for_reset) {
1639 rc = init_resources(adapter);
1642 } else if (adapter->req_rx_queues != old_num_rx_queues ||
1643 adapter->req_tx_queues != old_num_tx_queues) {
1644 adapter->map_id = 1;
1645 release_rx_pools(adapter);
1646 release_tx_pools(adapter);
1647 init_rx_pools(netdev);
1648 init_tx_pools(netdev);
1650 rc = reset_tx_pools(adapter);
1654 rc = reset_rx_pools(adapter);
1658 if (reset_state == VNIC_CLOSED)
1663 rc = __ibmvnic_open(netdev);
1665 if (list_empty(&adapter->rwi_list))
1666 adapter->state = VNIC_CLOSED;
1668 adapter->state = reset_state;
1673 netif_carrier_on(netdev);
1676 for (i = 0; i < adapter->req_rx_queues; i++)
1677 napi_schedule(&adapter->napi[i]);
1679 if (adapter->reset_reason != VNIC_RESET_FAILOVER)
1680 netdev_notify_peers(netdev);
1685 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
1687 struct ibmvnic_rwi *rwi;
1689 mutex_lock(&adapter->rwi_lock);
1691 if (!list_empty(&adapter->rwi_list)) {
1692 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
1694 list_del(&rwi->list);
1699 mutex_unlock(&adapter->rwi_lock);
1703 static void free_all_rwi(struct ibmvnic_adapter *adapter)
1705 struct ibmvnic_rwi *rwi;
1707 rwi = get_next_rwi(adapter);
1710 rwi = get_next_rwi(adapter);
1714 static void __ibmvnic_reset(struct work_struct *work)
1716 struct ibmvnic_rwi *rwi;
1717 struct ibmvnic_adapter *adapter;
1718 struct net_device *netdev;
1722 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
1723 netdev = adapter->netdev;
1725 mutex_lock(&adapter->reset_lock);
1726 adapter->resetting = true;
1727 reset_state = adapter->state;
1729 rwi = get_next_rwi(adapter);
1731 rc = do_reset(adapter, rwi, reset_state);
1733 if (rc && rc != IBMVNIC_INIT_FAILED)
1736 rwi = get_next_rwi(adapter);
1739 if (adapter->wait_for_reset) {
1740 adapter->wait_for_reset = false;
1741 adapter->reset_done_rc = rc;
1742 complete(&adapter->reset_done);
1746 netdev_dbg(adapter->netdev, "Reset failed\n");
1747 free_all_rwi(adapter);
1748 mutex_unlock(&adapter->reset_lock);
1752 adapter->resetting = false;
1753 mutex_unlock(&adapter->reset_lock);
1756 static void ibmvnic_reset(struct ibmvnic_adapter *adapter,
1757 enum ibmvnic_reset_reason reason)
1759 struct ibmvnic_rwi *rwi, *tmp;
1760 struct net_device *netdev = adapter->netdev;
1761 struct list_head *entry;
1763 if (adapter->state == VNIC_REMOVING ||
1764 adapter->state == VNIC_REMOVED) {
1765 netdev_dbg(netdev, "Adapter removing, skipping reset\n");
1769 if (adapter->state == VNIC_PROBING) {
1770 netdev_warn(netdev, "Adapter reset during probe\n");
1771 adapter->init_done_rc = EAGAIN;
1775 mutex_lock(&adapter->rwi_lock);
1777 list_for_each(entry, &adapter->rwi_list) {
1778 tmp = list_entry(entry, struct ibmvnic_rwi, list);
1779 if (tmp->reset_reason == reason) {
1780 netdev_dbg(netdev, "Skipping matching reset\n");
1781 mutex_unlock(&adapter->rwi_lock);
1786 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
1788 mutex_unlock(&adapter->rwi_lock);
1789 ibmvnic_close(netdev);
1793 rwi->reset_reason = reason;
1794 list_add_tail(&rwi->list, &adapter->rwi_list);
1795 mutex_unlock(&adapter->rwi_lock);
1797 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
1798 schedule_work(&adapter->ibmvnic_reset);
1801 static void ibmvnic_tx_timeout(struct net_device *dev)
1803 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1805 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
1808 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
1809 struct ibmvnic_rx_buff *rx_buff)
1811 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
1813 rx_buff->skb = NULL;
1815 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
1816 pool->next_alloc = (pool->next_alloc + 1) % pool->size;
1818 atomic_dec(&pool->available);
1821 static int ibmvnic_poll(struct napi_struct *napi, int budget)
1823 struct net_device *netdev = napi->dev;
1824 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1825 int scrq_num = (int)(napi - adapter->napi);
1826 int frames_processed = 0;
1829 while (frames_processed < budget) {
1830 struct sk_buff *skb;
1831 struct ibmvnic_rx_buff *rx_buff;
1832 union sub_crq *next;
1837 if (unlikely(adapter->resetting &&
1838 adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
1839 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1840 napi_complete_done(napi, frames_processed);
1841 return frames_processed;
1844 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
1846 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
1848 (struct ibmvnic_rx_buff *)be64_to_cpu(next->
1849 rx_comp.correlator);
1850 /* do error checking */
1851 if (next->rx_comp.rc) {
1852 netdev_dbg(netdev, "rx buffer returned with rc %x\n",
1853 be16_to_cpu(next->rx_comp.rc));
1854 /* free the entry */
1855 next->rx_comp.first = 0;
1856 remove_buff_from_pool(adapter, rx_buff);
1860 length = be32_to_cpu(next->rx_comp.len);
1861 offset = be16_to_cpu(next->rx_comp.off_frame_data);
1862 flags = next->rx_comp.flags;
1864 skb_copy_to_linear_data(skb, rx_buff->data + offset,
1867 /* VLAN Header has been stripped by the system firmware and
1868 * needs to be inserted by the driver
1870 if (adapter->rx_vlan_header_insertion &&
1871 (flags & IBMVNIC_VLAN_STRIPPED))
1872 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1873 ntohs(next->rx_comp.vlan_tci));
1875 /* free the entry */
1876 next->rx_comp.first = 0;
1877 remove_buff_from_pool(adapter, rx_buff);
1879 skb_put(skb, length);
1880 skb->protocol = eth_type_trans(skb, netdev);
1881 skb_record_rx_queue(skb, scrq_num);
1883 if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
1884 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
1885 skb->ip_summed = CHECKSUM_UNNECESSARY;
1889 napi_gro_receive(napi, skb); /* send it up */
1890 netdev->stats.rx_packets++;
1891 netdev->stats.rx_bytes += length;
1892 adapter->rx_stats_buffers[scrq_num].packets++;
1893 adapter->rx_stats_buffers[scrq_num].bytes += length;
1897 if (adapter->state != VNIC_CLOSING)
1898 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
1900 if (frames_processed < budget) {
1901 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1902 napi_complete_done(napi, frames_processed);
1903 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
1904 napi_reschedule(napi)) {
1905 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
1909 return frames_processed;
1912 #ifdef CONFIG_NET_POLL_CONTROLLER
1913 static void ibmvnic_netpoll_controller(struct net_device *dev)
1915 struct ibmvnic_adapter *adapter = netdev_priv(dev);
1918 replenish_pools(netdev_priv(dev));
1919 for (i = 0; i < adapter->req_rx_queues; i++)
1920 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
1921 adapter->rx_scrq[i]);
1925 static int wait_for_reset(struct ibmvnic_adapter *adapter)
1927 adapter->fallback.mtu = adapter->req_mtu;
1928 adapter->fallback.rx_queues = adapter->req_rx_queues;
1929 adapter->fallback.tx_queues = adapter->req_tx_queues;
1930 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
1931 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
1933 init_completion(&adapter->reset_done);
1934 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1935 adapter->wait_for_reset = true;
1936 wait_for_completion(&adapter->reset_done);
1938 if (adapter->reset_done_rc) {
1939 adapter->desired.mtu = adapter->fallback.mtu;
1940 adapter->desired.rx_queues = adapter->fallback.rx_queues;
1941 adapter->desired.tx_queues = adapter->fallback.tx_queues;
1942 adapter->desired.rx_entries = adapter->fallback.rx_entries;
1943 adapter->desired.tx_entries = adapter->fallback.tx_entries;
1945 init_completion(&adapter->reset_done);
1946 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
1947 wait_for_completion(&adapter->reset_done);
1949 adapter->wait_for_reset = false;
1951 return adapter->reset_done_rc;
1954 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
1956 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
1958 adapter->desired.mtu = new_mtu + ETH_HLEN;
1960 return wait_for_reset(adapter);
1963 static const struct net_device_ops ibmvnic_netdev_ops = {
1964 .ndo_open = ibmvnic_open,
1965 .ndo_stop = ibmvnic_close,
1966 .ndo_start_xmit = ibmvnic_xmit,
1967 .ndo_set_rx_mode = ibmvnic_set_multi,
1968 .ndo_set_mac_address = ibmvnic_set_mac,
1969 .ndo_validate_addr = eth_validate_addr,
1970 .ndo_tx_timeout = ibmvnic_tx_timeout,
1971 #ifdef CONFIG_NET_POLL_CONTROLLER
1972 .ndo_poll_controller = ibmvnic_netpoll_controller,
1974 .ndo_change_mtu = ibmvnic_change_mtu,
1977 /* ethtool functions */
1979 static int ibmvnic_get_link_ksettings(struct net_device *netdev,
1980 struct ethtool_link_ksettings *cmd)
1982 u32 supported, advertising;
1984 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
1986 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
1988 cmd->base.speed = SPEED_1000;
1989 cmd->base.duplex = DUPLEX_FULL;
1990 cmd->base.port = PORT_FIBRE;
1991 cmd->base.phy_address = 0;
1992 cmd->base.autoneg = AUTONEG_ENABLE;
1994 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1996 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
2002 static void ibmvnic_get_drvinfo(struct net_device *netdev,
2003 struct ethtool_drvinfo *info)
2005 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2007 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
2008 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
2009 strlcpy(info->fw_version, adapter->fw_version,
2010 sizeof(info->fw_version));
2013 static u32 ibmvnic_get_msglevel(struct net_device *netdev)
2015 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2017 return adapter->msg_enable;
2020 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
2022 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2024 adapter->msg_enable = data;
2027 static u32 ibmvnic_get_link(struct net_device *netdev)
2029 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2031 /* Don't need to send a query because we request a logical link up at
2032 * init and then we wait for link state indications
2034 return adapter->logical_link_state;
2037 static void ibmvnic_get_ringparam(struct net_device *netdev,
2038 struct ethtool_ringparam *ring)
2040 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2042 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
2043 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
2044 ring->rx_mini_max_pending = 0;
2045 ring->rx_jumbo_max_pending = 0;
2046 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
2047 ring->tx_pending = adapter->req_tx_entries_per_subcrq;
2048 ring->rx_mini_pending = 0;
2049 ring->rx_jumbo_pending = 0;
2052 static int ibmvnic_set_ringparam(struct net_device *netdev,
2053 struct ethtool_ringparam *ring)
2055 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2057 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
2058 ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
2059 netdev_err(netdev, "Invalid request.\n");
2060 netdev_err(netdev, "Max tx buffers = %llu\n",
2061 adapter->max_rx_add_entries_per_subcrq);
2062 netdev_err(netdev, "Max rx buffers = %llu\n",
2063 adapter->max_tx_entries_per_subcrq);
2067 adapter->desired.rx_entries = ring->rx_pending;
2068 adapter->desired.tx_entries = ring->tx_pending;
2070 return wait_for_reset(adapter);
2073 static void ibmvnic_get_channels(struct net_device *netdev,
2074 struct ethtool_channels *channels)
2076 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2078 channels->max_rx = adapter->max_rx_queues;
2079 channels->max_tx = adapter->max_tx_queues;
2080 channels->max_other = 0;
2081 channels->max_combined = 0;
2082 channels->rx_count = adapter->req_rx_queues;
2083 channels->tx_count = adapter->req_tx_queues;
2084 channels->other_count = 0;
2085 channels->combined_count = 0;
2088 static int ibmvnic_set_channels(struct net_device *netdev,
2089 struct ethtool_channels *channels)
2091 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
2093 adapter->desired.rx_queues = channels->rx_count;
2094 adapter->desired.tx_queues = channels->tx_count;
2096 return wait_for_reset(adapter);
2099 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2101 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2104 if (stringset != ETH_SS_STATS)
2107 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
2108 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
2110 for (i = 0; i < adapter->req_tx_queues; i++) {
2111 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
2112 data += ETH_GSTRING_LEN;
2114 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
2115 data += ETH_GSTRING_LEN;
2117 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
2118 data += ETH_GSTRING_LEN;
2121 for (i = 0; i < adapter->req_rx_queues; i++) {
2122 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
2123 data += ETH_GSTRING_LEN;
2125 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
2126 data += ETH_GSTRING_LEN;
2128 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
2129 data += ETH_GSTRING_LEN;
2133 static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
2135 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2139 return ARRAY_SIZE(ibmvnic_stats) +
2140 adapter->req_tx_queues * NUM_TX_STATS +
2141 adapter->req_rx_queues * NUM_RX_STATS;
2147 static void ibmvnic_get_ethtool_stats(struct net_device *dev,
2148 struct ethtool_stats *stats, u64 *data)
2150 struct ibmvnic_adapter *adapter = netdev_priv(dev);
2151 union ibmvnic_crq crq;
2154 memset(&crq, 0, sizeof(crq));
2155 crq.request_statistics.first = IBMVNIC_CRQ_CMD;
2156 crq.request_statistics.cmd = REQUEST_STATISTICS;
2157 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
2158 crq.request_statistics.len =
2159 cpu_to_be32(sizeof(struct ibmvnic_statistics));
2161 /* Wait for data to be written */
2162 init_completion(&adapter->stats_done);
2163 ibmvnic_send_crq(adapter, &crq);
2164 wait_for_completion(&adapter->stats_done);
2166 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
2167 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
2168 ibmvnic_stats[i].offset));
2170 for (j = 0; j < adapter->req_tx_queues; j++) {
2171 data[i] = adapter->tx_stats_buffers[j].packets;
2173 data[i] = adapter->tx_stats_buffers[j].bytes;
2175 data[i] = adapter->tx_stats_buffers[j].dropped_packets;
2179 for (j = 0; j < adapter->req_rx_queues; j++) {
2180 data[i] = adapter->rx_stats_buffers[j].packets;
2182 data[i] = adapter->rx_stats_buffers[j].bytes;
2184 data[i] = adapter->rx_stats_buffers[j].interrupts;
2189 static const struct ethtool_ops ibmvnic_ethtool_ops = {
2190 .get_drvinfo = ibmvnic_get_drvinfo,
2191 .get_msglevel = ibmvnic_get_msglevel,
2192 .set_msglevel = ibmvnic_set_msglevel,
2193 .get_link = ibmvnic_get_link,
2194 .get_ringparam = ibmvnic_get_ringparam,
2195 .set_ringparam = ibmvnic_set_ringparam,
2196 .get_channels = ibmvnic_get_channels,
2197 .set_channels = ibmvnic_set_channels,
2198 .get_strings = ibmvnic_get_strings,
2199 .get_sset_count = ibmvnic_get_sset_count,
2200 .get_ethtool_stats = ibmvnic_get_ethtool_stats,
2201 .get_link_ksettings = ibmvnic_get_link_ksettings,
2204 /* Routines for managing CRQs/sCRQs */
2206 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
2207 struct ibmvnic_sub_crq_queue *scrq)
2212 free_irq(scrq->irq, scrq);
2213 irq_dispose_mapping(scrq->irq);
2217 memset(scrq->msgs, 0, 4 * PAGE_SIZE);
2220 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2221 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2225 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
2229 for (i = 0; i < adapter->req_tx_queues; i++) {
2230 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
2231 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2236 for (i = 0; i < adapter->req_rx_queues; i++) {
2237 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
2238 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2246 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
2247 struct ibmvnic_sub_crq_queue *scrq)
2249 struct device *dev = &adapter->vdev->dev;
2252 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
2254 /* Close the sub-crqs */
2256 rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
2257 adapter->vdev->unit_address,
2259 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
2262 netdev_err(adapter->netdev,
2263 "Failed to release sub-CRQ %16lx, rc = %ld\n",
2267 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2269 free_pages((unsigned long)scrq->msgs, 2);
2273 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
2276 struct device *dev = &adapter->vdev->dev;
2277 struct ibmvnic_sub_crq_queue *scrq;
2280 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
2285 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
2287 dev_warn(dev, "Couldn't allocate crq queue messages page\n");
2288 goto zero_page_failed;
2291 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
2293 if (dma_mapping_error(dev, scrq->msg_token)) {
2294 dev_warn(dev, "Couldn't map crq queue messages page\n");
2298 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
2299 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
2301 if (rc == H_RESOURCE)
2302 rc = ibmvnic_reset_crq(adapter);
2304 if (rc == H_CLOSED) {
2305 dev_warn(dev, "Partner adapter not ready, waiting.\n");
2307 dev_warn(dev, "Error %d registering sub-crq\n", rc);
2311 scrq->adapter = adapter;
2312 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
2313 spin_lock_init(&scrq->lock);
2315 netdev_dbg(adapter->netdev,
2316 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
2317 scrq->crq_num, scrq->hw_irq, scrq->irq);
2322 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
2325 free_pages((unsigned long)scrq->msgs, 2);
2332 static void release_sub_crqs(struct ibmvnic_adapter *adapter)
2336 if (adapter->tx_scrq) {
2337 for (i = 0; i < adapter->req_tx_queues; i++) {
2338 if (!adapter->tx_scrq[i])
2341 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
2343 if (adapter->tx_scrq[i]->irq) {
2344 free_irq(adapter->tx_scrq[i]->irq,
2345 adapter->tx_scrq[i]);
2346 irq_dispose_mapping(adapter->tx_scrq[i]->irq);
2347 adapter->tx_scrq[i]->irq = 0;
2350 release_sub_crq_queue(adapter, adapter->tx_scrq[i]);
2353 kfree(adapter->tx_scrq);
2354 adapter->tx_scrq = NULL;
2357 if (adapter->rx_scrq) {
2358 for (i = 0; i < adapter->req_rx_queues; i++) {
2359 if (!adapter->rx_scrq[i])
2362 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
2364 if (adapter->rx_scrq[i]->irq) {
2365 free_irq(adapter->rx_scrq[i]->irq,
2366 adapter->rx_scrq[i]);
2367 irq_dispose_mapping(adapter->rx_scrq[i]->irq);
2368 adapter->rx_scrq[i]->irq = 0;
2371 release_sub_crq_queue(adapter, adapter->rx_scrq[i]);
2374 kfree(adapter->rx_scrq);
2375 adapter->rx_scrq = NULL;
2379 static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
2380 struct ibmvnic_sub_crq_queue *scrq)
2382 struct device *dev = &adapter->vdev->dev;
2385 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2386 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2388 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
2393 static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
2394 struct ibmvnic_sub_crq_queue *scrq)
2396 struct device *dev = &adapter->vdev->dev;
2399 if (scrq->hw_irq > 0x100000000ULL) {
2400 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
2404 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
2405 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
2407 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
2412 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
2413 struct ibmvnic_sub_crq_queue *scrq)
2415 struct device *dev = &adapter->vdev->dev;
2416 struct ibmvnic_tx_buff *txbuff;
2417 union sub_crq *next;
2423 while (pending_scrq(adapter, scrq)) {
2424 unsigned int pool = scrq->pool_index;
2426 next = ibmvnic_next_scrq(adapter, scrq);
2427 for (i = 0; i < next->tx_comp.num_comps; i++) {
2428 if (next->tx_comp.rcs[i]) {
2429 dev_err(dev, "tx error %x\n",
2430 next->tx_comp.rcs[i]);
2433 index = be32_to_cpu(next->tx_comp.correlators[i]);
2434 txbuff = &adapter->tx_pool[pool].tx_buff[index];
2436 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
2437 if (!txbuff->data_dma[j])
2440 txbuff->data_dma[j] = 0;
2442 /* if sub_crq was sent indirectly */
2443 first = txbuff->indir_arr[0].generic.first;
2444 if (first == IBMVNIC_CRQ_CMD) {
2445 dma_unmap_single(dev, txbuff->indir_dma,
2446 sizeof(txbuff->indir_arr),
2450 if (txbuff->last_frag) {
2451 dev_kfree_skb_any(txbuff->skb);
2455 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
2456 producer_index] = index;
2457 adapter->tx_pool[pool].producer_index =
2458 (adapter->tx_pool[pool].producer_index + 1) %
2459 adapter->req_tx_entries_per_subcrq;
2461 /* remove tx_comp scrq*/
2462 next->tx_comp.first = 0;
2464 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <=
2465 (adapter->req_tx_entries_per_subcrq / 2) &&
2466 __netif_subqueue_stopped(adapter->netdev,
2467 scrq->pool_index)) {
2468 netif_wake_subqueue(adapter->netdev, scrq->pool_index);
2469 netdev_info(adapter->netdev, "Started queue %d\n",
2474 enable_scrq_irq(adapter, scrq);
2476 if (pending_scrq(adapter, scrq)) {
2477 disable_scrq_irq(adapter, scrq);
2484 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
2486 struct ibmvnic_sub_crq_queue *scrq = instance;
2487 struct ibmvnic_adapter *adapter = scrq->adapter;
2489 disable_scrq_irq(adapter, scrq);
2490 ibmvnic_complete_tx(adapter, scrq);
2495 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
2497 struct ibmvnic_sub_crq_queue *scrq = instance;
2498 struct ibmvnic_adapter *adapter = scrq->adapter;
2500 /* When booting a kdump kernel we can hit pending interrupts
2501 * prior to completing driver initialization.
2503 if (unlikely(adapter->state != VNIC_OPEN))
2506 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
2508 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
2509 disable_scrq_irq(adapter, scrq);
2510 __napi_schedule(&adapter->napi[scrq->scrq_num]);
2516 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
2518 struct device *dev = &adapter->vdev->dev;
2519 struct ibmvnic_sub_crq_queue *scrq;
2523 for (i = 0; i < adapter->req_tx_queues; i++) {
2524 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
2526 scrq = adapter->tx_scrq[i];
2527 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2531 dev_err(dev, "Error mapping irq\n");
2532 goto req_tx_irq_failed;
2535 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
2536 0, "ibmvnic_tx", scrq);
2539 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
2541 irq_dispose_mapping(scrq->irq);
2542 goto req_rx_irq_failed;
2546 for (i = 0; i < adapter->req_rx_queues; i++) {
2547 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
2549 scrq = adapter->rx_scrq[i];
2550 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
2553 dev_err(dev, "Error mapping irq\n");
2554 goto req_rx_irq_failed;
2556 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
2557 0, "ibmvnic_rx", scrq);
2559 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
2561 irq_dispose_mapping(scrq->irq);
2562 goto req_rx_irq_failed;
2568 for (j = 0; j < i; j++) {
2569 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
2570 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2572 i = adapter->req_tx_queues;
2574 for (j = 0; j < i; j++) {
2575 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
2576 irq_dispose_mapping(adapter->rx_scrq[j]->irq);
2578 release_sub_crqs(adapter);
2582 static int init_sub_crqs(struct ibmvnic_adapter *adapter)
2584 struct device *dev = &adapter->vdev->dev;
2585 struct ibmvnic_sub_crq_queue **allqueues;
2586 int registered_queues = 0;
2591 total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
2593 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
2597 for (i = 0; i < total_queues; i++) {
2598 allqueues[i] = init_sub_crq_queue(adapter);
2599 if (!allqueues[i]) {
2600 dev_warn(dev, "Couldn't allocate all sub-crqs\n");
2603 registered_queues++;
2606 /* Make sure we were able to register the minimum number of queues */
2607 if (registered_queues <
2608 adapter->min_tx_queues + adapter->min_rx_queues) {
2609 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
2613 /* Distribute the failed allocated queues*/
2614 for (i = 0; i < total_queues - registered_queues + more ; i++) {
2615 netdev_dbg(adapter->netdev, "Reducing number of queues\n");
2618 if (adapter->req_rx_queues > adapter->min_rx_queues)
2619 adapter->req_rx_queues--;
2624 if (adapter->req_tx_queues > adapter->min_tx_queues)
2625 adapter->req_tx_queues--;
2632 adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
2633 sizeof(*adapter->tx_scrq), GFP_KERNEL);
2634 if (!adapter->tx_scrq)
2637 for (i = 0; i < adapter->req_tx_queues; i++) {
2638 adapter->tx_scrq[i] = allqueues[i];
2639 adapter->tx_scrq[i]->pool_index = i;
2642 adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
2643 sizeof(*adapter->rx_scrq), GFP_KERNEL);
2644 if (!adapter->rx_scrq)
2647 for (i = 0; i < adapter->req_rx_queues; i++) {
2648 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
2649 adapter->rx_scrq[i]->scrq_num = i;
2656 kfree(adapter->tx_scrq);
2657 adapter->tx_scrq = NULL;
2659 for (i = 0; i < registered_queues; i++)
2660 release_sub_crq_queue(adapter, allqueues[i]);
2665 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
2667 struct device *dev = &adapter->vdev->dev;
2668 union ibmvnic_crq crq;
2672 /* Sub-CRQ entries are 32 byte long */
2673 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
2675 if (adapter->min_tx_entries_per_subcrq > entries_page ||
2676 adapter->min_rx_add_entries_per_subcrq > entries_page) {
2677 dev_err(dev, "Fatal, invalid entries per sub-crq\n");
2681 if (adapter->desired.mtu)
2682 adapter->req_mtu = adapter->desired.mtu;
2684 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
2686 if (!adapter->desired.tx_entries)
2687 adapter->desired.tx_entries =
2688 adapter->max_tx_entries_per_subcrq;
2689 if (!adapter->desired.rx_entries)
2690 adapter->desired.rx_entries =
2691 adapter->max_rx_add_entries_per_subcrq;
2693 max_entries = IBMVNIC_MAX_LTB_SIZE /
2694 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
2696 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2697 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
2698 adapter->desired.tx_entries = max_entries;
2701 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
2702 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
2703 adapter->desired.rx_entries = max_entries;
2706 if (adapter->desired.tx_entries)
2707 adapter->req_tx_entries_per_subcrq =
2708 adapter->desired.tx_entries;
2710 adapter->req_tx_entries_per_subcrq =
2711 adapter->max_tx_entries_per_subcrq;
2713 if (adapter->desired.rx_entries)
2714 adapter->req_rx_add_entries_per_subcrq =
2715 adapter->desired.rx_entries;
2717 adapter->req_rx_add_entries_per_subcrq =
2718 adapter->max_rx_add_entries_per_subcrq;
2720 if (adapter->desired.tx_queues)
2721 adapter->req_tx_queues =
2722 adapter->desired.tx_queues;
2724 adapter->req_tx_queues =
2725 adapter->opt_tx_comp_sub_queues;
2727 if (adapter->desired.rx_queues)
2728 adapter->req_rx_queues =
2729 adapter->desired.rx_queues;
2731 adapter->req_rx_queues =
2732 adapter->opt_rx_comp_queues;
2734 adapter->req_rx_add_queues = adapter->max_rx_add_queues;
2737 memset(&crq, 0, sizeof(crq));
2738 crq.request_capability.first = IBMVNIC_CRQ_CMD;
2739 crq.request_capability.cmd = REQUEST_CAPABILITY;
2741 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
2742 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
2743 atomic_inc(&adapter->running_cap_crqs);
2744 ibmvnic_send_crq(adapter, &crq);
2746 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
2747 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
2748 atomic_inc(&adapter->running_cap_crqs);
2749 ibmvnic_send_crq(adapter, &crq);
2751 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
2752 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
2753 atomic_inc(&adapter->running_cap_crqs);
2754 ibmvnic_send_crq(adapter, &crq);
2756 crq.request_capability.capability =
2757 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
2758 crq.request_capability.number =
2759 cpu_to_be64(adapter->req_tx_entries_per_subcrq);
2760 atomic_inc(&adapter->running_cap_crqs);
2761 ibmvnic_send_crq(adapter, &crq);
2763 crq.request_capability.capability =
2764 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
2765 crq.request_capability.number =
2766 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
2767 atomic_inc(&adapter->running_cap_crqs);
2768 ibmvnic_send_crq(adapter, &crq);
2770 crq.request_capability.capability = cpu_to_be16(REQ_MTU);
2771 crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
2772 atomic_inc(&adapter->running_cap_crqs);
2773 ibmvnic_send_crq(adapter, &crq);
2775 if (adapter->netdev->flags & IFF_PROMISC) {
2776 if (adapter->promisc_supported) {
2777 crq.request_capability.capability =
2778 cpu_to_be16(PROMISC_REQUESTED);
2779 crq.request_capability.number = cpu_to_be64(1);
2780 atomic_inc(&adapter->running_cap_crqs);
2781 ibmvnic_send_crq(adapter, &crq);
2784 crq.request_capability.capability =
2785 cpu_to_be16(PROMISC_REQUESTED);
2786 crq.request_capability.number = cpu_to_be64(0);
2787 atomic_inc(&adapter->running_cap_crqs);
2788 ibmvnic_send_crq(adapter, &crq);
2792 static int pending_scrq(struct ibmvnic_adapter *adapter,
2793 struct ibmvnic_sub_crq_queue *scrq)
2795 union sub_crq *entry = &scrq->msgs[scrq->cur];
2797 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
2803 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
2804 struct ibmvnic_sub_crq_queue *scrq)
2806 union sub_crq *entry;
2807 unsigned long flags;
2809 spin_lock_irqsave(&scrq->lock, flags);
2810 entry = &scrq->msgs[scrq->cur];
2811 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2812 if (++scrq->cur == scrq->size)
2817 spin_unlock_irqrestore(&scrq->lock, flags);
2822 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
2824 struct ibmvnic_crq_queue *queue = &adapter->crq;
2825 union ibmvnic_crq *crq;
2827 crq = &queue->msgs[queue->cur];
2828 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
2829 if (++queue->cur == queue->size)
2838 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
2839 union sub_crq *sub_crq)
2841 unsigned int ua = adapter->vdev->unit_address;
2842 struct device *dev = &adapter->vdev->dev;
2843 u64 *u64_crq = (u64 *)sub_crq;
2846 netdev_dbg(adapter->netdev,
2847 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
2848 (unsigned long int)cpu_to_be64(remote_handle),
2849 (unsigned long int)cpu_to_be64(u64_crq[0]),
2850 (unsigned long int)cpu_to_be64(u64_crq[1]),
2851 (unsigned long int)cpu_to_be64(u64_crq[2]),
2852 (unsigned long int)cpu_to_be64(u64_crq[3]));
2854 /* Make sure the hypervisor sees the complete request */
2857 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
2858 cpu_to_be64(remote_handle),
2859 cpu_to_be64(u64_crq[0]),
2860 cpu_to_be64(u64_crq[1]),
2861 cpu_to_be64(u64_crq[2]),
2862 cpu_to_be64(u64_crq[3]));
2866 dev_warn(dev, "CRQ Queue closed\n");
2867 dev_err(dev, "Send error (rc=%d)\n", rc);
2873 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
2874 u64 remote_handle, u64 ioba, u64 num_entries)
2876 unsigned int ua = adapter->vdev->unit_address;
2877 struct device *dev = &adapter->vdev->dev;
2880 /* Make sure the hypervisor sees the complete request */
2882 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
2883 cpu_to_be64(remote_handle),
2888 dev_warn(dev, "CRQ Queue closed\n");
2889 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc);
2895 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
2896 union ibmvnic_crq *crq)
2898 unsigned int ua = adapter->vdev->unit_address;
2899 struct device *dev = &adapter->vdev->dev;
2900 u64 *u64_crq = (u64 *)crq;
2903 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
2904 (unsigned long int)cpu_to_be64(u64_crq[0]),
2905 (unsigned long int)cpu_to_be64(u64_crq[1]));
2907 /* Make sure the hypervisor sees the complete request */
2910 rc = plpar_hcall_norets(H_SEND_CRQ, ua,
2911 cpu_to_be64(u64_crq[0]),
2912 cpu_to_be64(u64_crq[1]));
2915 if (rc == H_CLOSED) {
2916 dev_warn(dev, "CRQ Queue closed\n");
2917 if (adapter->resetting)
2918 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
2921 dev_warn(dev, "Send error (rc=%d)\n", rc);
2927 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
2929 union ibmvnic_crq crq;
2931 memset(&crq, 0, sizeof(crq));
2932 crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
2933 crq.generic.cmd = IBMVNIC_CRQ_INIT;
2934 netdev_dbg(adapter->netdev, "Sending CRQ init\n");
2936 return ibmvnic_send_crq(adapter, &crq);
2939 static int send_version_xchg(struct ibmvnic_adapter *adapter)
2941 union ibmvnic_crq crq;
2943 memset(&crq, 0, sizeof(crq));
2944 crq.version_exchange.first = IBMVNIC_CRQ_CMD;
2945 crq.version_exchange.cmd = VERSION_EXCHANGE;
2946 crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
2948 return ibmvnic_send_crq(adapter, &crq);
2951 struct vnic_login_client_data {
2957 static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
2961 /* Calculate the amount of buffer space needed for the
2962 * vnic client data in the login buffer. There are four entries,
2963 * OS name, LPAR name, device name, and a null last entry.
2965 len = 4 * sizeof(struct vnic_login_client_data);
2966 len += 6; /* "Linux" plus NULL */
2967 len += strlen(utsname()->nodename) + 1;
2968 len += strlen(adapter->netdev->name) + 1;
2973 static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
2974 struct vnic_login_client_data *vlcd)
2976 const char *os_name = "Linux";
2979 /* Type 1 - LPAR OS */
2981 len = strlen(os_name) + 1;
2982 vlcd->len = cpu_to_be16(len);
2983 strncpy(&vlcd->name, os_name, len);
2984 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2986 /* Type 2 - LPAR name */
2988 len = strlen(utsname()->nodename) + 1;
2989 vlcd->len = cpu_to_be16(len);
2990 strncpy(&vlcd->name, utsname()->nodename, len);
2991 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len);
2993 /* Type 3 - device name */
2995 len = strlen(adapter->netdev->name) + 1;
2996 vlcd->len = cpu_to_be16(len);
2997 strncpy(&vlcd->name, adapter->netdev->name, len);
3000 static void send_login(struct ibmvnic_adapter *adapter)
3002 struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
3003 struct ibmvnic_login_buffer *login_buffer;
3004 struct device *dev = &adapter->vdev->dev;
3005 dma_addr_t rsp_buffer_token;
3006 dma_addr_t buffer_token;
3007 size_t rsp_buffer_size;
3008 union ibmvnic_crq crq;
3012 int client_data_len;
3013 struct vnic_login_client_data *vlcd;
3016 client_data_len = vnic_client_data_len(adapter);
3019 sizeof(struct ibmvnic_login_buffer) +
3020 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
3023 login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
3025 goto buf_alloc_failed;
3027 buffer_token = dma_map_single(dev, login_buffer, buffer_size,
3029 if (dma_mapping_error(dev, buffer_token)) {
3030 dev_err(dev, "Couldn't map login buffer\n");
3031 goto buf_map_failed;
3034 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
3035 sizeof(u64) * adapter->req_tx_queues +
3036 sizeof(u64) * adapter->req_rx_queues +
3037 sizeof(u64) * adapter->req_rx_queues +
3038 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
3040 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
3041 if (!login_rsp_buffer)
3042 goto buf_rsp_alloc_failed;
3044 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
3045 rsp_buffer_size, DMA_FROM_DEVICE);
3046 if (dma_mapping_error(dev, rsp_buffer_token)) {
3047 dev_err(dev, "Couldn't map login rsp buffer\n");
3048 goto buf_rsp_map_failed;
3051 adapter->login_buf = login_buffer;
3052 adapter->login_buf_token = buffer_token;
3053 adapter->login_buf_sz = buffer_size;
3054 adapter->login_rsp_buf = login_rsp_buffer;
3055 adapter->login_rsp_buf_token = rsp_buffer_token;
3056 adapter->login_rsp_buf_sz = rsp_buffer_size;
3058 login_buffer->len = cpu_to_be32(buffer_size);
3059 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
3060 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
3061 login_buffer->off_txcomp_subcrqs =
3062 cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
3063 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
3064 login_buffer->off_rxcomp_subcrqs =
3065 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
3066 sizeof(u64) * adapter->req_tx_queues);
3067 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
3068 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
3070 tx_list_p = (__be64 *)((char *)login_buffer +
3071 sizeof(struct ibmvnic_login_buffer));
3072 rx_list_p = (__be64 *)((char *)login_buffer +
3073 sizeof(struct ibmvnic_login_buffer) +
3074 sizeof(u64) * adapter->req_tx_queues);
3076 for (i = 0; i < adapter->req_tx_queues; i++) {
3077 if (adapter->tx_scrq[i]) {
3078 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
3083 for (i = 0; i < adapter->req_rx_queues; i++) {
3084 if (adapter->rx_scrq[i]) {
3085 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
3090 /* Insert vNIC login client data */
3091 vlcd = (struct vnic_login_client_data *)
3092 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
3093 login_buffer->client_data_offset =
3094 cpu_to_be32((char *)vlcd - (char *)login_buffer);
3095 login_buffer->client_data_len = cpu_to_be32(client_data_len);
3097 vnic_add_client_data(adapter, vlcd);
3099 netdev_dbg(adapter->netdev, "Login Buffer:\n");
3100 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
3101 netdev_dbg(adapter->netdev, "%016lx\n",
3102 ((unsigned long int *)(adapter->login_buf))[i]);
3105 memset(&crq, 0, sizeof(crq));
3106 crq.login.first = IBMVNIC_CRQ_CMD;
3107 crq.login.cmd = LOGIN;
3108 crq.login.ioba = cpu_to_be32(buffer_token);
3109 crq.login.len = cpu_to_be32(buffer_size);
3110 ibmvnic_send_crq(adapter, &crq);
3115 kfree(login_rsp_buffer);
3116 buf_rsp_alloc_failed:
3117 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
3119 kfree(login_buffer);
3124 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
3127 union ibmvnic_crq crq;
3129 memset(&crq, 0, sizeof(crq));
3130 crq.request_map.first = IBMVNIC_CRQ_CMD;
3131 crq.request_map.cmd = REQUEST_MAP;
3132 crq.request_map.map_id = map_id;
3133 crq.request_map.ioba = cpu_to_be32(addr);
3134 crq.request_map.len = cpu_to_be32(len);
3135 ibmvnic_send_crq(adapter, &crq);
3138 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
3140 union ibmvnic_crq crq;
3142 memset(&crq, 0, sizeof(crq));
3143 crq.request_unmap.first = IBMVNIC_CRQ_CMD;
3144 crq.request_unmap.cmd = REQUEST_UNMAP;
3145 crq.request_unmap.map_id = map_id;
3146 ibmvnic_send_crq(adapter, &crq);
3149 static void send_map_query(struct ibmvnic_adapter *adapter)
3151 union ibmvnic_crq crq;
3153 memset(&crq, 0, sizeof(crq));
3154 crq.query_map.first = IBMVNIC_CRQ_CMD;
3155 crq.query_map.cmd = QUERY_MAP;
3156 ibmvnic_send_crq(adapter, &crq);
3159 /* Send a series of CRQs requesting various capabilities of the VNIC server */
3160 static void send_cap_queries(struct ibmvnic_adapter *adapter)
3162 union ibmvnic_crq crq;
3164 atomic_set(&adapter->running_cap_crqs, 0);
3165 memset(&crq, 0, sizeof(crq));
3166 crq.query_capability.first = IBMVNIC_CRQ_CMD;
3167 crq.query_capability.cmd = QUERY_CAPABILITY;
3169 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
3170 atomic_inc(&adapter->running_cap_crqs);
3171 ibmvnic_send_crq(adapter, &crq);
3173 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
3174 atomic_inc(&adapter->running_cap_crqs);
3175 ibmvnic_send_crq(adapter, &crq);
3177 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
3178 atomic_inc(&adapter->running_cap_crqs);
3179 ibmvnic_send_crq(adapter, &crq);
3181 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
3182 atomic_inc(&adapter->running_cap_crqs);
3183 ibmvnic_send_crq(adapter, &crq);
3185 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
3186 atomic_inc(&adapter->running_cap_crqs);
3187 ibmvnic_send_crq(adapter, &crq);
3189 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
3190 atomic_inc(&adapter->running_cap_crqs);
3191 ibmvnic_send_crq(adapter, &crq);
3193 crq.query_capability.capability =
3194 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
3195 atomic_inc(&adapter->running_cap_crqs);
3196 ibmvnic_send_crq(adapter, &crq);
3198 crq.query_capability.capability =
3199 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
3200 atomic_inc(&adapter->running_cap_crqs);
3201 ibmvnic_send_crq(adapter, &crq);
3203 crq.query_capability.capability =
3204 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
3205 atomic_inc(&adapter->running_cap_crqs);
3206 ibmvnic_send_crq(adapter, &crq);
3208 crq.query_capability.capability =
3209 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
3210 atomic_inc(&adapter->running_cap_crqs);
3211 ibmvnic_send_crq(adapter, &crq);
3213 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
3214 atomic_inc(&adapter->running_cap_crqs);
3215 ibmvnic_send_crq(adapter, &crq);
3217 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
3218 atomic_inc(&adapter->running_cap_crqs);
3219 ibmvnic_send_crq(adapter, &crq);
3221 crq.query_capability.capability = cpu_to_be16(MIN_MTU);
3222 atomic_inc(&adapter->running_cap_crqs);
3223 ibmvnic_send_crq(adapter, &crq);
3225 crq.query_capability.capability = cpu_to_be16(MAX_MTU);
3226 atomic_inc(&adapter->running_cap_crqs);
3227 ibmvnic_send_crq(adapter, &crq);
3229 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
3230 atomic_inc(&adapter->running_cap_crqs);
3231 ibmvnic_send_crq(adapter, &crq);
3233 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
3234 atomic_inc(&adapter->running_cap_crqs);
3235 ibmvnic_send_crq(adapter, &crq);
3237 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
3238 atomic_inc(&adapter->running_cap_crqs);
3239 ibmvnic_send_crq(adapter, &crq);
3241 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
3242 atomic_inc(&adapter->running_cap_crqs);
3243 ibmvnic_send_crq(adapter, &crq);
3245 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
3246 atomic_inc(&adapter->running_cap_crqs);
3247 ibmvnic_send_crq(adapter, &crq);
3249 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
3250 atomic_inc(&adapter->running_cap_crqs);
3251 ibmvnic_send_crq(adapter, &crq);
3253 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
3254 atomic_inc(&adapter->running_cap_crqs);
3255 ibmvnic_send_crq(adapter, &crq);
3257 crq.query_capability.capability =
3258 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
3259 atomic_inc(&adapter->running_cap_crqs);
3260 ibmvnic_send_crq(adapter, &crq);
3262 crq.query_capability.capability =
3263 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
3264 atomic_inc(&adapter->running_cap_crqs);
3265 ibmvnic_send_crq(adapter, &crq);
3267 crq.query_capability.capability =
3268 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
3269 atomic_inc(&adapter->running_cap_crqs);
3270 ibmvnic_send_crq(adapter, &crq);
3272 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
3273 atomic_inc(&adapter->running_cap_crqs);
3274 ibmvnic_send_crq(adapter, &crq);
3277 static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
3278 struct ibmvnic_adapter *adapter)
3280 struct device *dev = &adapter->vdev->dev;
3282 if (crq->get_vpd_size_rsp.rc.code) {
3283 dev_err(dev, "Error retrieving VPD size, rc=%x\n",
3284 crq->get_vpd_size_rsp.rc.code);
3285 complete(&adapter->fw_done);
3289 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
3290 complete(&adapter->fw_done);
3293 static void handle_vpd_rsp(union ibmvnic_crq *crq,
3294 struct ibmvnic_adapter *adapter)
3296 struct device *dev = &adapter->vdev->dev;
3297 unsigned char *substr = NULL;
3298 u8 fw_level_len = 0;
3300 memset(adapter->fw_version, 0, 32);
3302 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
3305 if (crq->get_vpd_rsp.rc.code) {
3306 dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
3307 crq->get_vpd_rsp.rc.code);
3311 /* get the position of the firmware version info
3312 * located after the ASCII 'RM' substring in the buffer
3314 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
3316 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
3320 /* get length of firmware level ASCII substring */
3321 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
3322 fw_level_len = *(substr + 2);
3324 dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
3328 /* copy firmware version string from vpd into adapter */
3329 if ((substr + 3 + fw_level_len) <
3330 (adapter->vpd->buff + adapter->vpd->len)) {
3331 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
3333 dev_info(dev, "FW substr extrapolated VPD buff\n");
3337 if (adapter->fw_version[0] == '\0')
3338 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
3339 complete(&adapter->fw_done);
3342 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
3344 struct device *dev = &adapter->vdev->dev;
3345 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
3346 union ibmvnic_crq crq;
3349 dma_unmap_single(dev, adapter->ip_offload_tok,
3350 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
3352 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
3353 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
3354 netdev_dbg(adapter->netdev, "%016lx\n",
3355 ((unsigned long int *)(buf))[i]);
3357 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
3358 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
3359 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
3360 buf->tcp_ipv4_chksum);
3361 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
3362 buf->tcp_ipv6_chksum);
3363 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
3364 buf->udp_ipv4_chksum);
3365 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
3366 buf->udp_ipv6_chksum);
3367 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
3368 buf->large_tx_ipv4);
3369 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
3370 buf->large_tx_ipv6);
3371 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
3372 buf->large_rx_ipv4);
3373 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
3374 buf->large_rx_ipv6);
3375 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
3376 buf->max_ipv4_header_size);
3377 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
3378 buf->max_ipv6_header_size);
3379 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
3380 buf->max_tcp_header_size);
3381 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
3382 buf->max_udp_header_size);
3383 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
3384 buf->max_large_tx_size);
3385 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
3386 buf->max_large_rx_size);
3387 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
3388 buf->ipv6_extension_header);
3389 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
3390 buf->tcp_pseudosum_req);
3391 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
3392 buf->num_ipv6_ext_headers);
3393 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
3394 buf->off_ipv6_ext_headers);
3396 adapter->ip_offload_ctrl_tok =
3397 dma_map_single(dev, &adapter->ip_offload_ctrl,
3398 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
3400 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
3401 dev_err(dev, "Couldn't map ip offload control buffer\n");
3405 adapter->ip_offload_ctrl.len =
3406 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3407 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
3408 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
3409 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
3410 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
3411 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
3412 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
3413 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
3414 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
3415 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
3417 /* large_rx disabled for now, additional features needed */
3418 adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
3419 adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
3421 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
3423 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
3424 adapter->netdev->features |= NETIF_F_IP_CSUM;
3426 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
3427 adapter->netdev->features |= NETIF_F_IPV6_CSUM;
3429 if ((adapter->netdev->features &
3430 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
3431 adapter->netdev->features |= NETIF_F_RXCSUM;
3433 if (buf->large_tx_ipv4)
3434 adapter->netdev->features |= NETIF_F_TSO;
3435 if (buf->large_tx_ipv6)
3436 adapter->netdev->features |= NETIF_F_TSO6;
3438 adapter->netdev->hw_features |= adapter->netdev->features;
3440 memset(&crq, 0, sizeof(crq));
3441 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
3442 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
3443 crq.control_ip_offload.len =
3444 cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
3445 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
3446 ibmvnic_send_crq(adapter, &crq);
3449 static void handle_error_info_rsp(union ibmvnic_crq *crq,
3450 struct ibmvnic_adapter *adapter)
3452 struct device *dev = &adapter->vdev->dev;
3453 struct ibmvnic_error_buff *error_buff, *tmp;
3454 unsigned long flags;
3458 if (!crq->request_error_rsp.rc.code) {
3459 dev_info(dev, "Request Error Rsp returned with rc=%x\n",
3460 crq->request_error_rsp.rc.code);
3464 spin_lock_irqsave(&adapter->error_list_lock, flags);
3465 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list)
3466 if (error_buff->error_id == crq->request_error_rsp.error_id) {
3468 list_del(&error_buff->list);
3471 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3474 dev_err(dev, "Couldn't find error id %x\n",
3475 be32_to_cpu(crq->request_error_rsp.error_id));
3479 dev_err(dev, "Detailed info for error id %x:",
3480 be32_to_cpu(crq->request_error_rsp.error_id));
3482 for (i = 0; i < error_buff->len; i++) {
3483 pr_cont("%02x", (int)error_buff->buff[i]);
3489 dma_unmap_single(dev, error_buff->dma, error_buff->len,
3491 kfree(error_buff->buff);
3495 static void request_error_information(struct ibmvnic_adapter *adapter,
3496 union ibmvnic_crq *err_crq)
3498 struct device *dev = &adapter->vdev->dev;
3499 struct net_device *netdev = adapter->netdev;
3500 struct ibmvnic_error_buff *error_buff;
3501 unsigned long timeout = msecs_to_jiffies(30000);
3502 union ibmvnic_crq crq;
3503 unsigned long flags;
3506 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
3510 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz);
3511 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
3512 if (!error_buff->buff) {
3517 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
3519 if (dma_mapping_error(dev, error_buff->dma)) {
3520 netdev_err(netdev, "Couldn't map error buffer\n");
3521 kfree(error_buff->buff);
3526 error_buff->len = detail_len;
3527 error_buff->error_id = err_crq->error_indication.error_id;
3529 spin_lock_irqsave(&adapter->error_list_lock, flags);
3530 list_add_tail(&error_buff->list, &adapter->errors);
3531 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3533 memset(&crq, 0, sizeof(crq));
3534 crq.request_error_info.first = IBMVNIC_CRQ_CMD;
3535 crq.request_error_info.cmd = REQUEST_ERROR_INFO;
3536 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
3537 crq.request_error_info.len = cpu_to_be32(detail_len);
3538 crq.request_error_info.error_id = err_crq->error_indication.error_id;
3540 rc = ibmvnic_send_crq(adapter, &crq);
3542 netdev_err(netdev, "failed to request error information\n");
3546 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
3547 netdev_err(netdev, "timeout waiting for error information\n");
3554 spin_lock_irqsave(&adapter->error_list_lock, flags);
3555 list_del(&error_buff->list);
3556 spin_unlock_irqrestore(&adapter->error_list_lock, flags);
3558 kfree(error_buff->buff);
3562 static void handle_error_indication(union ibmvnic_crq *crq,
3563 struct ibmvnic_adapter *adapter)
3565 struct device *dev = &adapter->vdev->dev;
3567 dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
3568 crq->error_indication.flags
3569 & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
3570 be32_to_cpu(crq->error_indication.error_id),
3571 be16_to_cpu(crq->error_indication.error_cause));
3573 if (be32_to_cpu(crq->error_indication.error_id))
3574 request_error_information(adapter, crq);
3576 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
3577 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3579 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
3582 static int handle_change_mac_rsp(union ibmvnic_crq *crq,
3583 struct ibmvnic_adapter *adapter)
3585 struct net_device *netdev = adapter->netdev;
3586 struct device *dev = &adapter->vdev->dev;
3589 rc = crq->change_mac_addr_rsp.rc.code;
3591 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
3594 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
3597 complete(&adapter->fw_done);
3601 static void handle_request_cap_rsp(union ibmvnic_crq *crq,
3602 struct ibmvnic_adapter *adapter)
3604 struct device *dev = &adapter->vdev->dev;
3608 atomic_dec(&adapter->running_cap_crqs);
3609 switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
3611 req_value = &adapter->req_tx_queues;
3615 req_value = &adapter->req_rx_queues;
3618 case REQ_RX_ADD_QUEUES:
3619 req_value = &adapter->req_rx_add_queues;
3622 case REQ_TX_ENTRIES_PER_SUBCRQ:
3623 req_value = &adapter->req_tx_entries_per_subcrq;
3624 name = "tx_entries_per_subcrq";
3626 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
3627 req_value = &adapter->req_rx_add_entries_per_subcrq;
3628 name = "rx_add_entries_per_subcrq";
3631 req_value = &adapter->req_mtu;
3634 case PROMISC_REQUESTED:
3635 req_value = &adapter->promisc;
3639 dev_err(dev, "Got invalid cap request rsp %d\n",
3640 crq->request_capability.capability);
3644 switch (crq->request_capability_rsp.rc.code) {
3647 case PARTIALSUCCESS:
3648 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
3650 (long int)be64_to_cpu(crq->request_capability_rsp.
3653 if (be16_to_cpu(crq->request_capability_rsp.capability) ==
3655 pr_err("mtu of %llu is not supported. Reverting.\n",
3657 *req_value = adapter->fallback.mtu;
3660 be64_to_cpu(crq->request_capability_rsp.number);
3663 ibmvnic_send_req_caps(adapter, 1);
3666 dev_err(dev, "Error %d in request cap rsp\n",
3667 crq->request_capability_rsp.rc.code);
3671 /* Done receiving requested capabilities, query IP offload support */
3672 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3673 union ibmvnic_crq newcrq;
3674 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
3675 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
3676 &adapter->ip_offload_buf;
3678 adapter->wait_capability = false;
3679 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
3683 if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
3684 if (!firmware_has_feature(FW_FEATURE_CMO))
3685 dev_err(dev, "Couldn't map offload buffer\n");
3689 memset(&newcrq, 0, sizeof(newcrq));
3690 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
3691 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
3692 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
3693 newcrq.query_ip_offload.ioba =
3694 cpu_to_be32(adapter->ip_offload_tok);
3696 ibmvnic_send_crq(adapter, &newcrq);
3700 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
3701 struct ibmvnic_adapter *adapter)
3703 struct device *dev = &adapter->vdev->dev;
3704 struct net_device *netdev = adapter->netdev;
3705 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
3706 struct ibmvnic_login_buffer *login = adapter->login_buf;
3709 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
3711 dma_unmap_single(dev, adapter->login_rsp_buf_token,
3712 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
3714 /* If the number of queues requested can't be allocated by the
3715 * server, the login response will return with code 1. We will need
3716 * to resend the login buffer with fewer queues requested.
3718 if (login_rsp_crq->generic.rc.code) {
3719 adapter->renegotiate = true;
3720 complete(&adapter->init_done);
3724 netdev->mtu = adapter->req_mtu - ETH_HLEN;
3726 netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
3727 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
3728 netdev_dbg(adapter->netdev, "%016lx\n",
3729 ((unsigned long int *)(adapter->login_rsp_buf))[i]);
3733 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
3734 (be32_to_cpu(login->num_rxcomp_subcrqs) *
3735 adapter->req_rx_add_queues !=
3736 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
3737 dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
3738 ibmvnic_remove(adapter->vdev);
3741 complete(&adapter->init_done);
3746 static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
3747 struct ibmvnic_adapter *adapter)
3749 struct device *dev = &adapter->vdev->dev;
3752 rc = crq->request_unmap_rsp.rc.code;
3754 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
3757 static void handle_query_map_rsp(union ibmvnic_crq *crq,
3758 struct ibmvnic_adapter *adapter)
3760 struct net_device *netdev = adapter->netdev;
3761 struct device *dev = &adapter->vdev->dev;
3764 rc = crq->query_map_rsp.rc.code;
3766 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
3769 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
3770 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
3771 crq->query_map_rsp.free_pages);
3774 static void handle_query_cap_rsp(union ibmvnic_crq *crq,
3775 struct ibmvnic_adapter *adapter)
3777 struct net_device *netdev = adapter->netdev;
3778 struct device *dev = &adapter->vdev->dev;
3781 atomic_dec(&adapter->running_cap_crqs);
3782 netdev_dbg(netdev, "Outstanding queries: %d\n",
3783 atomic_read(&adapter->running_cap_crqs));
3784 rc = crq->query_capability.rc.code;
3786 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
3790 switch (be16_to_cpu(crq->query_capability.capability)) {
3792 adapter->min_tx_queues =
3793 be64_to_cpu(crq->query_capability.number);
3794 netdev_dbg(netdev, "min_tx_queues = %lld\n",
3795 adapter->min_tx_queues);
3798 adapter->min_rx_queues =
3799 be64_to_cpu(crq->query_capability.number);
3800 netdev_dbg(netdev, "min_rx_queues = %lld\n",
3801 adapter->min_rx_queues);
3803 case MIN_RX_ADD_QUEUES:
3804 adapter->min_rx_add_queues =
3805 be64_to_cpu(crq->query_capability.number);
3806 netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
3807 adapter->min_rx_add_queues);
3810 adapter->max_tx_queues =
3811 be64_to_cpu(crq->query_capability.number);
3812 netdev_dbg(netdev, "max_tx_queues = %lld\n",
3813 adapter->max_tx_queues);
3816 adapter->max_rx_queues =
3817 be64_to_cpu(crq->query_capability.number);
3818 netdev_dbg(netdev, "max_rx_queues = %lld\n",
3819 adapter->max_rx_queues);
3821 case MAX_RX_ADD_QUEUES:
3822 adapter->max_rx_add_queues =
3823 be64_to_cpu(crq->query_capability.number);
3824 netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
3825 adapter->max_rx_add_queues);
3827 case MIN_TX_ENTRIES_PER_SUBCRQ:
3828 adapter->min_tx_entries_per_subcrq =
3829 be64_to_cpu(crq->query_capability.number);
3830 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
3831 adapter->min_tx_entries_per_subcrq);
3833 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
3834 adapter->min_rx_add_entries_per_subcrq =
3835 be64_to_cpu(crq->query_capability.number);
3836 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
3837 adapter->min_rx_add_entries_per_subcrq);
3839 case MAX_TX_ENTRIES_PER_SUBCRQ:
3840 adapter->max_tx_entries_per_subcrq =
3841 be64_to_cpu(crq->query_capability.number);
3842 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
3843 adapter->max_tx_entries_per_subcrq);
3845 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
3846 adapter->max_rx_add_entries_per_subcrq =
3847 be64_to_cpu(crq->query_capability.number);
3848 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
3849 adapter->max_rx_add_entries_per_subcrq);
3851 case TCP_IP_OFFLOAD:
3852 adapter->tcp_ip_offload =
3853 be64_to_cpu(crq->query_capability.number);
3854 netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
3855 adapter->tcp_ip_offload);
3857 case PROMISC_SUPPORTED:
3858 adapter->promisc_supported =
3859 be64_to_cpu(crq->query_capability.number);
3860 netdev_dbg(netdev, "promisc_supported = %lld\n",
3861 adapter->promisc_supported);
3864 adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
3865 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
3866 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
3869 adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
3870 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
3871 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
3873 case MAX_MULTICAST_FILTERS:
3874 adapter->max_multicast_filters =
3875 be64_to_cpu(crq->query_capability.number);
3876 netdev_dbg(netdev, "max_multicast_filters = %lld\n",
3877 adapter->max_multicast_filters);
3879 case VLAN_HEADER_INSERTION:
3880 adapter->vlan_header_insertion =
3881 be64_to_cpu(crq->query_capability.number);
3882 if (adapter->vlan_header_insertion)
3883 netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
3884 netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
3885 adapter->vlan_header_insertion);
3887 case RX_VLAN_HEADER_INSERTION:
3888 adapter->rx_vlan_header_insertion =
3889 be64_to_cpu(crq->query_capability.number);
3890 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
3891 adapter->rx_vlan_header_insertion);
3893 case MAX_TX_SG_ENTRIES:
3894 adapter->max_tx_sg_entries =
3895 be64_to_cpu(crq->query_capability.number);
3896 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
3897 adapter->max_tx_sg_entries);
3899 case RX_SG_SUPPORTED:
3900 adapter->rx_sg_supported =
3901 be64_to_cpu(crq->query_capability.number);
3902 netdev_dbg(netdev, "rx_sg_supported = %lld\n",
3903 adapter->rx_sg_supported);
3905 case OPT_TX_COMP_SUB_QUEUES:
3906 adapter->opt_tx_comp_sub_queues =
3907 be64_to_cpu(crq->query_capability.number);
3908 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
3909 adapter->opt_tx_comp_sub_queues);
3911 case OPT_RX_COMP_QUEUES:
3912 adapter->opt_rx_comp_queues =
3913 be64_to_cpu(crq->query_capability.number);
3914 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
3915 adapter->opt_rx_comp_queues);
3917 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
3918 adapter->opt_rx_bufadd_q_per_rx_comp_q =
3919 be64_to_cpu(crq->query_capability.number);
3920 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
3921 adapter->opt_rx_bufadd_q_per_rx_comp_q);
3923 case OPT_TX_ENTRIES_PER_SUBCRQ:
3924 adapter->opt_tx_entries_per_subcrq =
3925 be64_to_cpu(crq->query_capability.number);
3926 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
3927 adapter->opt_tx_entries_per_subcrq);
3929 case OPT_RXBA_ENTRIES_PER_SUBCRQ:
3930 adapter->opt_rxba_entries_per_subcrq =
3931 be64_to_cpu(crq->query_capability.number);
3932 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
3933 adapter->opt_rxba_entries_per_subcrq);
3935 case TX_RX_DESC_REQ:
3936 adapter->tx_rx_desc_req = crq->query_capability.number;
3937 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
3938 adapter->tx_rx_desc_req);
3942 netdev_err(netdev, "Got invalid cap rsp %d\n",
3943 crq->query_capability.capability);
3947 if (atomic_read(&adapter->running_cap_crqs) == 0) {
3948 adapter->wait_capability = false;
3949 ibmvnic_send_req_caps(adapter, 0);
3953 static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
3954 struct ibmvnic_adapter *adapter)
3956 struct ibmvnic_generic_crq *gen_crq = &crq->generic;
3957 struct net_device *netdev = adapter->netdev;
3958 struct device *dev = &adapter->vdev->dev;
3959 u64 *u64_crq = (u64 *)crq;
3962 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
3963 (unsigned long int)cpu_to_be64(u64_crq[0]),
3964 (unsigned long int)cpu_to_be64(u64_crq[1]));
3965 switch (gen_crq->first) {
3966 case IBMVNIC_CRQ_INIT_RSP:
3967 switch (gen_crq->cmd) {
3968 case IBMVNIC_CRQ_INIT:
3969 dev_info(dev, "Partner initialized\n");
3970 adapter->from_passive_init = true;
3971 complete(&adapter->init_done);
3973 case IBMVNIC_CRQ_INIT_COMPLETE:
3974 dev_info(dev, "Partner initialization complete\n");
3975 send_version_xchg(adapter);
3978 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
3981 case IBMVNIC_CRQ_XPORT_EVENT:
3982 netif_carrier_off(netdev);
3983 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
3984 dev_info(dev, "Migrated, re-enabling adapter\n");
3985 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
3986 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
3987 dev_info(dev, "Backing device failover detected\n");
3988 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
3990 /* The adapter lost the connection */
3991 dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
3993 ibmvnic_reset(adapter, VNIC_RESET_FATAL);
3996 case IBMVNIC_CRQ_CMD_RSP:
3999 dev_err(dev, "Got an invalid msg type 0x%02x\n",
4004 switch (gen_crq->cmd) {
4005 case VERSION_EXCHANGE_RSP:
4006 rc = crq->version_exchange_rsp.rc.code;
4008 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
4011 dev_info(dev, "Partner protocol version is %d\n",
4012 crq->version_exchange_rsp.version);
4013 if (be16_to_cpu(crq->version_exchange_rsp.version) <
4016 be16_to_cpu(crq->version_exchange_rsp.version);
4017 send_cap_queries(adapter);
4019 case QUERY_CAPABILITY_RSP:
4020 handle_query_cap_rsp(crq, adapter);
4023 handle_query_map_rsp(crq, adapter);
4025 case REQUEST_MAP_RSP:
4026 adapter->fw_done_rc = crq->request_map_rsp.rc.code;
4027 complete(&adapter->fw_done);
4029 case REQUEST_UNMAP_RSP:
4030 handle_request_unmap_rsp(crq, adapter);
4032 case REQUEST_CAPABILITY_RSP:
4033 handle_request_cap_rsp(crq, adapter);
4036 netdev_dbg(netdev, "Got Login Response\n");
4037 handle_login_rsp(crq, adapter);
4039 case LOGICAL_LINK_STATE_RSP:
4041 "Got Logical Link State Response, state: %d rc: %d\n",
4042 crq->logical_link_state_rsp.link_state,
4043 crq->logical_link_state_rsp.rc.code);
4044 adapter->logical_link_state =
4045 crq->logical_link_state_rsp.link_state;
4046 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
4047 complete(&adapter->init_done);
4049 case LINK_STATE_INDICATION:
4050 netdev_dbg(netdev, "Got Logical Link State Indication\n");
4051 adapter->phys_link_state =
4052 crq->link_state_indication.phys_link_state;
4053 adapter->logical_link_state =
4054 crq->link_state_indication.logical_link_state;
4056 case CHANGE_MAC_ADDR_RSP:
4057 netdev_dbg(netdev, "Got MAC address change Response\n");
4058 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
4060 case ERROR_INDICATION:
4061 netdev_dbg(netdev, "Got Error Indication\n");
4062 handle_error_indication(crq, adapter);
4064 case REQUEST_ERROR_RSP:
4065 netdev_dbg(netdev, "Got Error Detail Response\n");
4066 handle_error_info_rsp(crq, adapter);
4068 case REQUEST_STATISTICS_RSP:
4069 netdev_dbg(netdev, "Got Statistics Response\n");
4070 complete(&adapter->stats_done);
4072 case QUERY_IP_OFFLOAD_RSP:
4073 netdev_dbg(netdev, "Got Query IP offload Response\n");
4074 handle_query_ip_offload_rsp(adapter);
4076 case MULTICAST_CTRL_RSP:
4077 netdev_dbg(netdev, "Got multicast control Response\n");
4079 case CONTROL_IP_OFFLOAD_RSP:
4080 netdev_dbg(netdev, "Got Control IP offload Response\n");
4081 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
4082 sizeof(adapter->ip_offload_ctrl),
4084 complete(&adapter->init_done);
4086 case COLLECT_FW_TRACE_RSP:
4087 netdev_dbg(netdev, "Got Collect firmware trace Response\n");
4088 complete(&adapter->fw_done);
4090 case GET_VPD_SIZE_RSP:
4091 handle_vpd_size_rsp(crq, adapter);
4094 handle_vpd_rsp(crq, adapter);
4097 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
4102 static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
4104 struct ibmvnic_adapter *adapter = instance;
4106 tasklet_schedule(&adapter->tasklet);
4110 static void ibmvnic_tasklet(void *data)
4112 struct ibmvnic_adapter *adapter = data;
4113 struct ibmvnic_crq_queue *queue = &adapter->crq;
4114 union ibmvnic_crq *crq;
4115 unsigned long flags;
4118 spin_lock_irqsave(&queue->lock, flags);
4120 /* Pull all the valid messages off the CRQ */
4121 while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
4122 ibmvnic_handle_crq(crq, adapter);
4123 crq->generic.first = 0;
4126 /* remain in tasklet until all
4127 * capabilities responses are received
4129 if (!adapter->wait_capability)
4132 /* if capabilities CRQ's were sent in this tasklet, the following
4133 * tasklet must wait until all responses are received
4135 if (atomic_read(&adapter->running_cap_crqs) != 0)
4136 adapter->wait_capability = true;
4137 spin_unlock_irqrestore(&queue->lock, flags);
4140 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
4142 struct vio_dev *vdev = adapter->vdev;
4146 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
4147 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
4150 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
4155 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
4157 struct ibmvnic_crq_queue *crq = &adapter->crq;
4158 struct device *dev = &adapter->vdev->dev;
4159 struct vio_dev *vdev = adapter->vdev;
4164 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4165 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4167 /* Clean out the queue */
4168 memset(crq->msgs, 0, PAGE_SIZE);
4171 /* And re-open it again */
4172 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4173 crq->msg_token, PAGE_SIZE);
4176 /* Adapter is good, but other end is not ready */
4177 dev_warn(dev, "Partner adapter not ready\n");
4179 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
4184 static void release_crq_queue(struct ibmvnic_adapter *adapter)
4186 struct ibmvnic_crq_queue *crq = &adapter->crq;
4187 struct vio_dev *vdev = adapter->vdev;
4193 netdev_dbg(adapter->netdev, "Releasing CRQ\n");
4194 free_irq(vdev->irq, adapter);
4195 tasklet_kill(&adapter->tasklet);
4197 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4198 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4200 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
4202 free_page((unsigned long)crq->msgs);
4206 static int init_crq_queue(struct ibmvnic_adapter *adapter)
4208 struct ibmvnic_crq_queue *crq = &adapter->crq;
4209 struct device *dev = &adapter->vdev->dev;
4210 struct vio_dev *vdev = adapter->vdev;
4211 int rc, retrc = -ENOMEM;
4216 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
4217 /* Should we allocate more than one page? */
4222 crq->size = PAGE_SIZE / sizeof(*crq->msgs);
4223 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
4225 if (dma_mapping_error(dev, crq->msg_token))
4228 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
4229 crq->msg_token, PAGE_SIZE);
4231 if (rc == H_RESOURCE)
4232 /* maybe kexecing and resource is busy. try a reset */
4233 rc = ibmvnic_reset_crq(adapter);
4236 if (rc == H_CLOSED) {
4237 dev_warn(dev, "Partner adapter not ready\n");
4239 dev_warn(dev, "Error %d opening adapter\n", rc);
4240 goto reg_crq_failed;
4245 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
4246 (unsigned long)adapter);
4248 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
4249 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
4252 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
4254 goto req_irq_failed;
4257 rc = vio_enable_interrupts(vdev);
4259 dev_err(dev, "Error %d enabling interrupts\n", rc);
4260 goto req_irq_failed;
4264 spin_lock_init(&crq->lock);
4269 tasklet_kill(&adapter->tasklet);
4271 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
4272 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
4274 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
4276 free_page((unsigned long)crq->msgs);
4281 static int ibmvnic_init(struct ibmvnic_adapter *adapter)
4283 struct device *dev = &adapter->vdev->dev;
4284 unsigned long timeout = msecs_to_jiffies(30000);
4287 if (adapter->resetting && !adapter->wait_for_reset) {
4288 rc = ibmvnic_reset_crq(adapter);
4290 rc = vio_enable_interrupts(adapter->vdev);
4292 rc = init_crq_queue(adapter);
4296 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc);
4300 adapter->from_passive_init = false;
4302 init_completion(&adapter->init_done);
4303 adapter->init_done_rc = 0;
4304 ibmvnic_send_crq_init(adapter);
4305 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
4306 dev_err(dev, "Initialization sequence timed out\n");
4310 if (adapter->init_done_rc) {
4311 release_crq_queue(adapter);
4312 return adapter->init_done_rc;
4315 if (adapter->from_passive_init) {
4316 adapter->state = VNIC_OPEN;
4317 adapter->from_passive_init = false;
4321 if (adapter->resetting && !adapter->wait_for_reset)
4322 rc = reset_sub_crq_queues(adapter);
4324 rc = init_sub_crqs(adapter);
4326 dev_err(dev, "Initialization of sub crqs failed\n");
4327 release_crq_queue(adapter);
4331 rc = init_sub_crq_irqs(adapter);
4333 dev_err(dev, "Failed to initialize sub crq irqs\n");
4334 release_crq_queue(adapter);
4340 static struct device_attribute dev_attr_failover;
4342 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
4344 struct ibmvnic_adapter *adapter;
4345 struct net_device *netdev;
4346 unsigned char *mac_addr_p;
4349 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
4352 mac_addr_p = (unsigned char *)vio_get_attribute(dev,
4353 VETH_MAC_ADDR, NULL);
4356 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
4357 __FILE__, __LINE__);
4361 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
4362 IBMVNIC_MAX_QUEUES);
4366 adapter = netdev_priv(netdev);
4367 adapter->state = VNIC_PROBING;
4368 dev_set_drvdata(&dev->dev, netdev);
4369 adapter->vdev = dev;
4370 adapter->netdev = netdev;
4372 ether_addr_copy(adapter->mac_addr, mac_addr_p);
4373 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
4374 netdev->irq = dev->irq;
4375 netdev->netdev_ops = &ibmvnic_netdev_ops;
4376 netdev->ethtool_ops = &ibmvnic_ethtool_ops;
4377 SET_NETDEV_DEV(netdev, &dev->dev);
4379 spin_lock_init(&adapter->stats_lock);
4381 INIT_LIST_HEAD(&adapter->errors);
4382 spin_lock_init(&adapter->error_list_lock);
4384 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
4385 INIT_LIST_HEAD(&adapter->rwi_list);
4386 mutex_init(&adapter->reset_lock);
4387 mutex_init(&adapter->rwi_lock);
4388 adapter->resetting = false;
4390 adapter->mac_change_pending = false;
4393 rc = ibmvnic_init(adapter);
4394 if (rc && rc != EAGAIN)
4395 goto ibmvnic_init_fail;
4396 } while (rc == EAGAIN);
4398 netdev->mtu = adapter->req_mtu - ETH_HLEN;
4399 netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
4400 netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
4402 rc = device_create_file(&dev->dev, &dev_attr_failover);
4404 goto ibmvnic_init_fail;
4406 netif_carrier_off(netdev);
4407 rc = register_netdev(netdev);
4409 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
4410 goto ibmvnic_register_fail;
4412 dev_info(&dev->dev, "ibmvnic registered\n");
4414 adapter->state = VNIC_PROBED;
4416 adapter->wait_for_reset = false;
4420 ibmvnic_register_fail:
4421 device_remove_file(&dev->dev, &dev_attr_failover);
4424 release_sub_crqs(adapter);
4425 release_crq_queue(adapter);
4426 free_netdev(netdev);
4431 static int ibmvnic_remove(struct vio_dev *dev)
4433 struct net_device *netdev = dev_get_drvdata(&dev->dev);
4434 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4436 adapter->state = VNIC_REMOVING;
4437 unregister_netdev(netdev);
4438 mutex_lock(&adapter->reset_lock);
4440 release_resources(adapter);
4441 release_sub_crqs(adapter);
4442 release_crq_queue(adapter);
4444 adapter->state = VNIC_REMOVED;
4446 mutex_unlock(&adapter->reset_lock);
4447 device_remove_file(&dev->dev, &dev_attr_failover);
4448 free_netdev(netdev);
4449 dev_set_drvdata(&dev->dev, NULL);
4454 static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
4455 const char *buf, size_t count)
4457 struct net_device *netdev = dev_get_drvdata(dev);
4458 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4459 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
4460 __be64 session_token;
4463 if (!sysfs_streq(buf, "1"))
4466 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
4467 H_GET_SESSION_TOKEN, 0, 0, 0);
4469 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
4474 session_token = (__be64)retbuf[0];
4475 netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
4476 be64_to_cpu(session_token));
4477 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
4478 H_SESSION_ERR_DETECTED, session_token, 0, 0);
4480 netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
4488 static DEVICE_ATTR_WO(failover);
4490 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
4492 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
4493 struct ibmvnic_adapter *adapter;
4494 struct iommu_table *tbl;
4495 unsigned long ret = 0;
4498 tbl = get_iommu_table_base(&vdev->dev);
4500 /* netdev inits at probe time along with the structures we need below*/
4502 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
4504 adapter = netdev_priv(netdev);
4506 ret += PAGE_SIZE; /* the crq message queue */
4507 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
4509 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
4510 ret += 4 * PAGE_SIZE; /* the scrq message queue */
4512 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
4514 ret += adapter->rx_pool[i].size *
4515 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
4520 static int ibmvnic_resume(struct device *dev)
4522 struct net_device *netdev = dev_get_drvdata(dev);
4523 struct ibmvnic_adapter *adapter = netdev_priv(netdev);
4525 if (adapter->state != VNIC_OPEN)
4528 tasklet_schedule(&adapter->tasklet);
4533 static const struct vio_device_id ibmvnic_device_table[] = {
4534 {"network", "IBM,vnic"},
4537 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
4539 static const struct dev_pm_ops ibmvnic_pm_ops = {
4540 .resume = ibmvnic_resume
4543 static struct vio_driver ibmvnic_driver = {
4544 .id_table = ibmvnic_device_table,
4545 .probe = ibmvnic_probe,
4546 .remove = ibmvnic_remove,
4547 .get_desired_dma = ibmvnic_get_desired_dma,
4548 .name = ibmvnic_driver_name,
4549 .pm = &ibmvnic_pm_ops,
4552 /* module functions */
4553 static int __init ibmvnic_module_init(void)
4555 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
4556 IBMVNIC_DRIVER_VERSION);
4558 return vio_register_driver(&ibmvnic_driver);
4561 static void __exit ibmvnic_module_exit(void)
4563 vio_unregister_driver(&ibmvnic_driver);
4566 module_init(ibmvnic_module_init);
4567 module_exit(ibmvnic_module_exit);